SUNWAYFOTO brand Arca-Swiss compatible. DDC-42 42mm Clamp. Very versatile Jaw opening range of 37.25mm to 41.5mm will accommodate any Arca style plate from various makers including: Really right stuff (RRS), Wimberley, Jobu Design, Arca Swiss, Kirk Enterprises, Markins, etc. 1/4" mounting hole. Can be used on virtually any head, tripod or monopod. Or remove your existing clamp and replace it using the 5mm hex screw provided. Will fit many brands of ball heads & Gimbals including Arca-swiss, Jobu, RRS etc. Use included Metric 6 hex head screw to mount onto a ballhead. All Metal knob, no rubber or plastic, for long term durability. Length: 42mm. Width: 53mm. Height: 13mm. Weight: 54g. 3/8" Standard thread will fit on any standard tripod or head. 1/4" steel bushing adapter (included) converts it to 1/4" thread. All metal construction. Includes bubble level.