Seiko 22mm Watch Case Back Opener

Exactly what it says in the name, a little coin shaped wrench to fit into the grooves on the back of a 22mm Seiko watch. Fits snug enough to hold the back without falling out, and won't mar the metal at all if it somehow slips off. Made for a vintage Seiko I bought recently with a 2205 movement. Designed in Fusion 360, and printed on a Saturn 4 Ultra 16k at .05mm layer height. Not sure how well it would print using an FDM printer, as it has fairly tightly tolerances. Might end up expanding the cylinder the that acts as a grip, as it was a big hard to get a good grip to twist it off with, but it did the job and I don't imagine it will get enough use to warrant an upgrade. STL file and OBJ file both included, feel free to edit to better suit your needs!