A quick-to-print adapter when a 1/4-20 bolt (such as a camera tripod or camera mount) is needed. A hex nut or the hex head of a 1/4-20 bolt can fit the adapter and you simply attach the adapter to whatever it is you want to mount. It's 25mm (1") square and with 3M VHB tape, it's an easy way to mount the adapter to a camera, a wall or ceiling, or just about anything.