BDSM Wrist Cuff - pin

A wrist sized cuff for bondage play.  It uses a sliding front plate for closure.  The plate locks in place, and requires a key for removal.  The key is made from a paperclip, bent to the necessary size/shape.

cuff inside dimensions: 64 x 45 x 40 mm

I use a small finishing nail, 1 1/2 inch long, for the hinge pin.  If you like, you can use a pin vise to drill the hinge pin holes out, and use a piece of 1.75 mm filament for the hinge pin. 

To make the key, bend a small paperclip into a "U" shape.  Put the ends thru the holes in the key block, press the center part down flat into the block, then use superglue to glue the cap in place.  Put the tails thru the holes in the face plate, and trim them so they sit just a little above the inside surface of the plate.  Then, file the ends smooth.

Be careful when removing supports from around the spring tabs on the cuff.  It's easy to break them off if you are not gentle.

There is another version of this cuff that uses small magnets for the lock and key: https://www.printables.com/model/1575000-bdsm-wrist-cuff-magnetic-lock   There are also ankle sized cuffs available, with either locking mechanism.

If you need a different size, there are several more sizes available on my Thingiverse page.  For some reason, I cannot convince printables to import it: https://www.thingiverse.com/thing:6927211   If none of those sizes are correct, let me know what dimensions you need in the comments, and I'll be happy to upload the STL files for you.