Auto locking quick release

A mechanism that automatically locks onto a 6mm pin and releases easily with a pull or push on a lever.

For safety reasons don't us it for handling dangerous loads.

Install springs or rubber band as shown in image. Then gently hammer it together with a hammer. You can expand the holes in hook, arms and shackle with a 6mm and 4mm drill, if they don't fit. Sharpen corners of level arms at contact point with a file if they are not sharp 90 degree.