Feature: 1. DM-55 Clamp and QR Quick Release Plate Compatible Arca Swiss for 55mm Ball Head. 2. Standard 3/8\u0027\u0027 threads, can be directly mounted on 3/8 thread of devices, such as monopod. 3. Add 1/4\u0027\u0027 conversion thread to be directly connected to the ordinary camera. 4. Fast loading base with antiskid lock function. 5. Jaw can be opened from 37mm to 42mm, it will accommodate any Arca style plate. Specification: Features: All-metal materials, CNC precision machining, surface oxidationtreatment Standard 3/8'' threads, can be directly mounted on 3/8 thread of devices, such as monopod. Fast loading base with antiskid lock function. Add 1/4'' conversion thread to be directly connected to the ordinary camera. 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: Metal Color: Black Item size: 9.8 * 5.5 * 2.5cm / 3.9 * 2.2 * 1.0in Item weight: 114g / 4.02oz Package List: 1 * DM-55 Clamp and QR Quick Release Plate Package List: 1 * DM-55 Clamp and QR Quick Release Plate