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ARK's Krypto-Bite™ - stylish chewelry in 3 different toughness levels

ARK's Krypto-Bite™ Chewable Gem Necklace

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  • Product Description

    A go-to-chew; Click to see all 14 colors|||Made in the USA, ARK's Krypto-Bite™ Chewable Gem Necklace provides a safe, wearable, and discreet solution for kids and adults who need to chew. For boys, it's cool-factor Krypto-Bite™. For girls, it's a stylish gem pendant. Either way, it's sure to be a hit!  Use this "chewelry" as an oral fidget (or even hand fidget) to help calm, soothe, and self-regulate during times of stress, or to better focus during homework and other activities. Modeled after the extension of the Grabber®, the prism-shaped pendant also comes in 3 color-coded toughness levels:

    • Standard - This is the softest level, recommended for mild chewers (those who do not chew through anything).
    • XT / Medium Firm - This is the middle level, which we call XT ("Xtra Tough").  It's firmer, but still fairly chewy, recommended for moderate chewers.
    • XXT / Very Firm - This is the toughest level, which we call XXT ("Xtra Xtra Tough").  It still has some “chewability” to it, but it’s fairly rigid / pretty firm.  No chew tool is indestructible, but this is usually the longest lasting level for avid chewers.

    Choose your option from the menu above. Each pendant is sold individually with its own breakaway necklace cord. Or, you can also buy more than one pendant and create your own custom statement chew necklace (like the first picture, for example). Color hues may vary slightly.

    Made in the USA  Designed, manufactured, and assembled in the USA by ARK Therapeutic.  Medical grade, FDA compliant, NO lead, phthalates, PVC, BPA, or latex.

    Caution Caution: This product is not a toy.  The clasp and cord are not intended for chewing.  Contains small parts that may pose a choking hazard - direct supervision required.  Recommended for ages 5 years and up.  Although these chew tools are sturdy and durable, no chew tool is indestructible.  Wear/tear may be expected given the nature of the intended use.  How long they last is typically equal to the amount and intensity of the chewing, as well as other variables (such as jaw strength, stress/anxiety levels, if other sensory strategies are in place, etc.).  While for some people a chew tool will last forever, for others with heavy/aggressive oral needs, they may go through it very quickly.  Please supervise at all times, regularly inspect the chew tool, and replace if necessary if the item shows signs of wear and tear.  For the longest lasting chew tool overall, click here. 


    • 18 years ago, ARK's Grabber® was the first solution on the market specifically for children who needed a safe alternative to chewing on their hands, clothes, pencils, etc. This prism-shaped pendant is modeled after the same Grabber® that you've come to know and love, but shaped into a fun and fashionable design for biting, chewing, and oral motor input. 
    • Designed and sized to look just like a regular piece of jewelry, the Krypto-Bite™ is a very discreet way to chew.  Hence the name, which comes from the Greek word kryptos ("hidden, concealed, secret").
    • Each pendant measures 3 inches in length and .5 inch in diameter (very similar in size as the extension of the Grabber).
    • The cord measures approximately 36 inches in length. If desired, you can shorten the cord by scooting the thread out of the clasp, retying the knot at a shorter length, and then trimming the excess thread.
    • Designed, manufactured, and assembled in the USA
    • Highly recommended for individuals who have Autism, sensory needs, anxiety, ADHD, etc.



  • Product Reviews


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    1. Love it!

      My kid chewed through the bite sabers XT and XXT but we got this one and the guitar chew and we used the guitar at home(she's homeschooled so she's at home most of the time)and the gem when we were out.

    2. Lovely!

      My crystal just came in the mail today! I had ordered it on the 1st of November, it arrived on the 3rd! Very fast delivery.

      I bought the crystal for myself to help with my anxiety and to save any pencils/graphical tablet pens as I'd chew them without thinking while inspecting my work.

      Very pleasant to chew on for XXT Lavender.

    3. Love it!

      Love this thing! I just wish it was possible to choose toughness and colour independent of each other, I'd kill for the new "ghost" colour in soft. It would be great for people who are sensitive to certain colours but still need a specific toughness level

    4. Perfect!

      This is such a wonderful chew, and stylish too! It came around my finals week and was a godsend. I chewed my XXT one flat in 3 days though, but that's just me I'm sure. I love your products and I Love your fast shipping to Canada!

    5. Exactly What We Needed

      Our son is 2 and has recently been diagnosed with SPD. This was perfect for him! He chews on everything from pillows to his shirt, so having this with him has been a huge help. It reaches his back teeth and helps him calm down. It has also cut down on him biting himself and others. So glad we found these!

    6. Perfect!

      The krypto-bite has been an excellent tool, at home, while shopping, and in the classroom. He chews and his perpetual bouncing virtually comes to a complete stop. Even his teacher has commented what a huge difference the krypto-bite makes when he's not actively engaged in an activity or walking from one area of the school to another.

    7. Perfect for my son's hyperactivity!

      My son's kindergarten teacher recently suggested some kind of chewing vice that would be acceptable in the classroom. I had seen Ark advertised on Facebook a few months back, but I hadn't gotten around to it. I asked my son to select the shape and the color of what he wanted. I reminded him it was not a toy. Starting with the softest one, I figured I would work up from there - which I do already need to do. He's chewing on the Krypto-bite instead of chewing holes in his shirts. And his hyperactivity has already been noticeably less in the classroom, according to his teacher. I placed an order last night for my son's next Chewlery piece!

    8. Seems to be working

      My daughter loves it! Chews on it like crazy whenever she has it on. Bought her the softest style because she chews her fingers a lot. I was worried she would chew right through it, but it seems to be holding up very well so far! Considering buying an extra to have one at school and one at home.

    9. able to check through at the string hole

      We are so thankful for your products and the Y-chew and Brick stick are holding up great, but the krytobite was less durable. My son was able to somehow chew through it at the weak spot of the necklace hole. We will continue using your products, but will need to stick with the brick stick and the y-chew for now. Thanks so much!

    10. Very helpful!

      Thank you for making these products! My child always has his necklace on and it really helps settle him. I actually want to request you make an XXXT as well - because he can go through one of these in about a week! Also - have you considered flavoring them as an option?

    11. Loved it so much, we bought it twice!

      Our 5 year old daughter is a fiddlesome, fidgety nibbler. She twitters with her lips until they are red, chews and sucks on her shirt sleeves, puts just about ANYthing in her mouth and often can be found biting her toenails while watching a movie (who needs popcorn?). We bought her the sturdier purple krypto-bite necklace around Thanksgiving and she gnawed on it for about a week, taking it here and there. Her toenails and shirts had almost recovered, but then we lost it somewhere. After looking here and there, cleaning the house and calling around to several lost-and-founds, I ordered her another. And when she loses this one (as we all know she will), I will be ordering a third!

    12. Perfect!

      Love the assortment of colors, prices and toughness levels.. only thing that is a little discerning is the shipping cost. The necklace was reasonably priced at $10 but shipping was half that. Would love to see shipping option between first class or priority so we have a choice cost-wise. Thank you!

    13. Amazing! Don't know how I lived without this before.

      I love this product. I am an 18 year old college student. Having this chew is helping me get control over my horrible nail biting habit, as well as offer me a great stress relief activity for during the day and or finals week. Before I used this, I had been chewing on everything. Toothpicks, gum, water bottles, plastic sometimes. Anything I could find. I honestly wish I had had one of these much much earlier. The results have been astounding to me. My nail biting has all but stopped, and I feel much less stress in general.

    14. Nice product

      My daughter was having problems with biting other children, so I got her this to give her somthing "safe" to bite instead. It has worked wonderfully and now she doesn't bite anything else

    15. krypto necklace

      I have a 23 year old daughter who I bought 2 0f these to try. One an xx tough and one x tough. We tried the teal one and she chewed trough it in 2 days. The lavender one is definitely tougher than the teal & I like having it around her neck so we can keep track of it.

    16. Stands the test!

      I have foster children who are chewers. They chewed up my house! I tried store bought biters and they didn't last. BUT...after buying this! This has held to the test! And my house remains in tact!!

    17. like it much better than other products

      My daughter has used this for about 2 weeks now, and it's awesome! She had another chewy necklace before, and managed to chew bits of it within a few days. The cord is a touch long for my small 7 year old, but we just put a knot in it in the morning.

    18. Great product

      My son likes chewing on his shirt collar. This was perfect b/c it hung down in the same area and he liked the texture. The only thing I didn't like was the breakaway feature. My son kept taking it off and losing it. I wish it had a stretchy rubber cord instead, but who knows if that would hold up?

    19. Cool design for son. Mom approved chewelry

      My son loves his teal gem shaped chewelry. It reminds him of his favorite block building video game. I like it because it saves him from chewing holes in his shirts, bitting his nails, and from chewing on unsafe objects. We are very happy with our order and will order more in the future.

    20. good qaulity

      my son has not used this one yet, rt now he is using the dino one. but we have used the brick one in the past and it worked very well as I'm sure this one will too

  • Other Details

    feature: Safe, stylish, discreet
    feature: Each pendant is 3" long and ½" in diameter - perfect for reaching the back molars
    feature: 3 color-coded toughness levels
    feature: Adjustable breakaway cord
    feature: Personally made by ARK in Columbia, SC USA
    feature: See full details below

ARK chew tools come in 3 color-coded toughness levels:

Usually we recommend going with the softest/standard level by default. Unless someone chews through or causes damage to anything else they chew on (chews through pencils, chews holes in shirts, etc.), in which case the XT level would be longer lasting.

If someone does chew through things, it’s possible they may need the toughest XXT level eventually. XXT is super firm, though, so we don't always recommend getting it right off the bat (some people find it uncomfortable chewing on something that firm).

So XXT is usually best either for people who have chewed through the XT level already, and/or for anyone who already likes chewing on very hard items - things like legos, hard plastic toys, wooden items, etc.

Heads up: Designs that are wider and "beefier" will feel tougher than designs that are more slender in the same toughness level. For example, the Dino-Bite in XT will feel tougher than the Krypto-Bite in XT.


Probe Tip - This is the most versatile & popular tip attachment. It's bumpy on one side and striated on the other side for different levels of sensory input (the bumpy side provides more input than the striated side).

Mini Tip - This is a smaller version of the Probe Tip, designed for smaller mouths (about 2.5 years and under). This age recommendation is not a hard-and-fast rule though - we've seen younger kids use the Probe Tip and older individuals use the Mini Tip.

Preefer Tip - This tip attachment is rounded with ridges all along the circumference for when a "rolling" action is desired for a different kind of sensory input. Roll it over the lips, across the tongue, and inside the cheeks.

Fine Tip - This tip narrows down to a fine point, which makes it perfect for pinpointing very specific areas in the mouth.

Bite-n-Chew Tip - These tips are rounded and chewable, for practicing biting & chewing skills. The "extra long" versions are about an inch longer and a little skinnier, to make it easier to reach the back molars. The textured version has bumps for extra sensory input.

Bite Tube Tip - These tips are similar to the Bite-n-Chew Tip, but with a hollow center so that you can put puréed foods (applesauce, yogurt, etc.) inside the tip for functional biting & chewing practice. Once you bite down on the tip, you get 'rewarded' with a taste of food.

Spoon Tip - Great for feeding therapy and mealtimes, these attachments turn the Z-Vibe into a vibrating spoon! The smooth, gentle vibration can help "wake up" the mouth and decrease aversions. The textured version has bumps on the bottom of the spoon bowl to help stimulate the tongue and lower lip, and to help encourage the transition from puréed to more solid foods. The hard Spoon Tip is rigid, like a regular spoon. The soft Spoon Tip is flexible (still firm enough to hold food, but flexible enough to be gentle on the teeth if someone bites down on the spoon.

Tongue Tip - This tip can be used as a traditional tongue scraper to help establish good oral care. It can also be used to help establish the concept of tongue lateralization and elevation (hold the Tongue Tip vertically in front of the mouth and ask the individual to put the tip of their tongue inside the hole, then guide the tongue from side to side or up and down). You can also place the Tongue Tip flat on top of the tongue to provide input to a large surface area of the tongue (this tip has the largest "footprint" surface-area-wise).

Popette Tip - This tip attachment is an adaptor that lets you use lollipops with the Z-Vibe. Just twist the Popette Tip into the Z-Vibe handle, then press a lollipop into the Popette Tip. Lollipops are a fun way to get kids interested in sensory oral motor exercises.

Brush Tips - The soft version has gentle bristles for gum massage; the hard version has firmer bristles closer to that of a traditional toothbrush. These can be used to help get orally sensitive individuals more comfortable with oral care, so that they can eventually use regular toothbrushes, be more comfortable going to the dentist, etc.

Pencil - This attachment turns your Z-Vibe into a vibrating pencil! The vibration of the Z-Vibe is very smooth, so it doesn't create squiggly lines. Instead, it can help increase focus by providing more sensory input and awareness to the hand.

Pen - This attachment turns your Z-Vibe into a vibrating pen.

Crayon - And this attachment turns your Z-Vibe into a vibrating crayon.

Brick Tip - This tip attachment has large bumps on one side and small bumps on the other side for lots of varying sensory input while biting & chewing. It comes in 3 toughness levels for mild to moderate to avid chewing.