The Cambo CBH-3 is a surprisingly compact, super-sturdy ball head. It's designed to hold a 4x5 camera, but it can be used for pretty much anything else, within reason. The base has an inner 3/8" thread for mounting to legs of your choice; the camera mount is a 1/4" outer thread. In very good condition, with minor cosmetic surface scuffs from normal use. Excellent function with strong locking action.