FANAUE Aluminium 40mm Quick Release Clamp with 1/4-inch Adapter Compatible with Arca Swiss for DSLR Camera Tripod Ball Head and Acra Mount for Tripod Sturdy aluminum alloy construction, CNC precision machining, anodic surface treatment, corrosion resistance and wear resistance. 1/4" convert screw and 1" ball adapter to provide a secure connection between your camera and L bracket. for tripods, monopods, stabilizers, gimbals and ball heads. Compatible for Arca-Swiss quick release plates. Built The non-slip rubber pad protects the camera and prevents wearing out. knob design, well locked to prevent accidental dropping of the camera. 40mm(1.57") in length. Adapter jaws will accept plates from 38-40mm wide. Compatible with any Arca Swiss style plate. Compact size of 3.3" in length and 1" in width, with an item weight of 156g and packed weight of 192g. Includes a quick release plate, 1" ball, and clamp for quick release L plate. Perfect for professional photographers who need a secure and adjustable quick release system.