Sometimes it costs more to buy it than to make it from the money itself.
Photography by Tom Parker
SIMPLE COMBINATION LOCKS ARE based on a shaft with rotating disks. I made this one out of 5 quarters, 2 half-dollars, and a penny (plus an odd assortment of scrap metal, nuts, and bolts). It looks complicated but it’s actually very simple.
For illustration purposes, I made the drawer front out of ⅜"-thick clear acrylic (A) so you can see both inside and outside the drawer.
The drawer lock works like this: ...