Features: All-metal material, CNC precision machining, anode surface anti-oxidation treatment. Clamping Lever: The lever can be stopped in 2 positions: fully closed and fully open. The open position allows the quick release plate to slide into the clamp for positioning adjustment. Spring-loaded locking pin. Quick Release Plate: The mat anti-slip rubber on the plate which makes it closely combined with the camera. Clamp and plate compatible with Arca-Swiss standard, including Arca Swiss, RRS, Kirk, Wimberley, Markins, Sunwayfoto, Kangrinpoche, Benro, Sirui etc . Specification: Model: P50 Material: Aluminum Alloy Type: Lever Clamp + Quick Release Plate Size: 50mm*50mm*25mm Attachment: 1 /4" on Plate, 3/8" Mount Socket on Base Compatibility: All ARCA-SWISS standard quick release plates, such as RR/ARCA-SWISS / KIRK / Wimberley / MARKINS / SUNWAYFOTO / kangrinpoche / BENRO / SIRUI etc. Package Included: 1 x Clamp 1 x Quick Release Plate