ITEM NAME:Aluminum Universal Quick Release Clamp DC-38 With Arca-Swiss Compatible for Description: CNC precision machining, surface anode anti-oxidation treatment, the body and washer is made of aluminium alloy and copper. Compatible with all AS quick release plate , such as RRS / ARCA-SWISS / KIRK / Wimberley / MARKINS / SUNWAYFOTO / / BENRO / SIRUI etc. When loose the screw, you can adjust the width of clamp. 38mm (1.5") Long Mounting Thread: 1/4" Specification: Material: Aluminum Alloy Color: Matte Black Mounting Thread: 1/4 Length: 2.95"/75mm Width: 1.5"/38mm Package Includes: 1x Screw Knob Clamp with Hand Strap Gap SKU: ALU0017961377004357.When loose the screw, you can adjust the width of clamp. 1x Screw Knob Clamp with Hand Strap Gap. Compatible with all AS quick release plate, such as RRS / ARCA-SWISS / KIRK / Wimberley / MARKINS / SUNWAYFOTO / / BENRO / SIRUI etc.