Features: 480mm long extended quick release plate with 38mm wide double dovetail base, compatible with Arca-Swiss standard clamp. Designed with 1/4 3/8 screw holes, can be installed to tripods with 1/4 or 3/8 screw easily. 2 standard QR plate with 1/4 screw, allows you to 2 cameras/ 1 camera + 1 speedlite on one tripod simultaneously. The bobble level and anti-slip rubber pads ensure balanced, stable and safe usage. High-quality aluminum alloy material, using CNC machining technology, durable and wear-proof.