Feature:1. All-metal materials, CNC precision machining, surface oxidation treatment.2. Fast loading base with antiskid lock function.3. With gradienter and scale plate, convenient for use.4. Jaw can be opened from 37mm to 42mm, it will accommodate any Arca style plate such as, RRS, Wimberley, Jobu Design, Arca Swiss, Kirk Enterprises, Markins, etc.5. Standard 1/4" threads, can be directly mounted on 1/4 thread of devices.6. Standard 1/4Specification:Features:All-metal materials, CNC precision machining, surface oxidation treatmentStandard 1/4" threads, can be directly mounted on 1/4 thread of devices.Fast loading base with antiskid lock function.With gradienter and scale plate, convenient for use.Jaw can be opened from 37mm to 42mm, it will accommodate any Arca style plate such as, RRS, Wimberley, Jobu Design, Arca Swiss, Kirk Enterprises, Markins, etc.Specifications:Material: MetalColor: BlackItem size: 7.8 * 5 * 2.0cm / 3.1 * 2.0 * 0.8inPackage weight: 95g / 3.32ozPackage List:1 * Clamp for Quick Release Plate1 * 1/4" ScrewPackage List:1 * Clamp for Quick Release Plate1 * 1/4" Screw