A braided tube that turns pulling into squeezing. Pull it and watch the diameter shrink on exact helix kinematics, play six traps (four of which really can be pulled free), and read the closed-form holding force checked against a Coulomb simulator that was never given it. Built from the public-domain folk device and the published McKibben braid relations; the grip model is derived here. Runs entirely in the browser — no model, no credits, no server call.

Every public app is built from a security-scanned skill and must pass a clean scan — skill and frontend — before it can be listed. Have a skill of your own? Turn it into an app — or read the step-by-step walkthrough.