Neewer Black Aluminum Alloy Quick Release QR Plate Adapter with 1/4"-3/8" Screw and Bubble Lever for DSLR Camera Tripod Monopod Stabilizer Ball Head professional plate enables quick and easy transfer among your camera and tripod. Save your time and energy, lessen the potential abrasion to the bottom screw thread of your camera. Solid built by aluminum alloy, longer longevity compared to those made of plastic. Double lock lever deliver ensurance and safety for your camera in case accidental fall off. No more restriction! Flat bottom enables tripod deck of any diameter. Up to FOUR bubble lever help you better perceive your position more accurately