CowboyStudio FT6663AH Photography Heavy Duty Camera Tripod Action Ball Head Quick Release Plate One (1) Tripod head FT6663H Screw size: 1/4 inch for camera; 3/8 inch for tripods compatible to all major brands. Plate size: 2"x1 3/4" Smooth operation with one hand, Horizontal and vertical position Tripod Head Size: 40 x 33mm / 1.6 x 1.3in Compatible with all cameras and camcorders