Flat Bone

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The Flat Bone breaks the traditional Knuckle Bone geometry down into two 2D interlocking pieces that slot together to form a 3D Knuckle Roller. 

It handles all standard knuckle bone and knuckle roller trick sets, but the X-cross section changes the contact dynamics. The central ridges create a continuous rolling axis, letting you walk and spin the roller across your knuckles with a distinct contact roll giving it a feel reminiscent of a dragon staff rolling across your fingers.

Watch The Commercial:
https://www.youtube.com/watch?v=N1EETympmKU

Key Specs:
Mechanism: Two-piece interlocking geometry.
Playstyle: Standard Knuckle Bone + Dragon roll manipulation. 
Carry: Ultra compact - packs completely flat when disassembled.

Product Notes & Care:

    Fitment & Alignment: Each set is tolerance-fitted as a matched pair during production. If a set feels tight or has difficulty sliding together on the first try, flip one piece 180° and slide again—the directional fit usually clears it right up.

    Color Swapping: While you can mix pieces from different colorways, cross-set interchangeability is not guaranteed. Each pair is built and finished together, so swapping parts between sets may result in a tighter or looser fit.

    Build & Durability: Print quality is high and structural strength is solid, but the individual 2D plates are thin around the interlocking slot areas. Avoid excessive bending or heavy pressure when the toy is disassembled to prevent bend or stress fractures. With normal play and smart storage, it will last a very long time.