Literally user-friendly and like no others. This versatile and one-of-a-kind projector mount is fabricated with ball joint, providing totally 360 degree movement for fine positioning, and saving you much working time. Ratchet handle gives a positive and firm lock to fasten. The base is slotted with vortex pattern for maximum flexibility of accommodating diverse brands of projectors. Bi-functional top can be used as dia. 16mm socket (hole) or dia. 28mm spigot for fitting various clamps.