Features: Made of high quality aluminum alloy, CNC precision machining, with smooth surface, durable and lightweight. Surface oxidation treatment, anti-friction anti-corrosion. With embedded bubble level, can conveniently adjust the levels when shooting. Knob-type design for strong universality. Can conveniently adjust the width of clamp from 38mm to 45mm. Equipped with 1/4 to 3/8 adapter screw, can mount the clamp on most brands of tripods, ball heads, brackets and so on. With location notches, can prevent your camera from accidentally dropping. Adopts commonly used quick release system of Arca standard, compatible with various brands of quick release plate and support accessories. Such as for RSS, for Arca-Swiss, for Kirk, for Marking, for Benro, for Sirui, for SUNWAYFOTO, for Photo, for Clam, etc.