Over-centre toggle latch

A draw latch for toolboxes, flight cases and storage bins: flip the lever over, hook the loop on the catch and push the lever down, and it pulls the lid tight and snaps past centre so it stays shut. It prints as four flat pieces, a base and a catch that screw on with countersunk screws, the lever and the loop, and the hinges are plain filament pushed through the holes. Adjust the screw size, the plate spacing, how hard it locks and how far it pulls, and tune the pin fit for your printer. Every part prints flat with no supports.