Handcuffs

thingiverse

Assembly requires 12 M4x12MM bolts and 14 M4 nuts. The process involves identical sides, each comprising six printed pieces that are assembled using five M4 bolts and five M4 nuts. The printed components include two sides, a hook that encloses the wrist, a ratchet that grasps the hook when closed, a spring pushing the ratchet towards the hook, a pin securing the locking piece in place, and a spacer allowing the hook to move freely without being wedged between the two sides. Internal pieces are depicted in the third included image. The chain is connected to each side using one M4x12MM bolt with its head cut off and two M4 nuts. One nut is positioned between the main parts of each side, while the other nut is placed at the end of the chain, securing a bolt with a cut-off head into both nuts.