SmallRig Quick Release Clamp and Plate (Arca-type Compatible) 2144 includes an Arca-type clamp and a plate. Tightness of the clamp can be adjusted by stirring the tiny screw on the lever, so it is also cross-compatible with most Arca type plates. The plate is attached to the bottom of cameras or cages by screw(s). The clamp features multiple 1/4??-20, 3/8??-16 threaded holes and thorough mounting holes on the bottom, so you can mount it on tripods, jibs and other devices. Compatibility: Arca-type Compatible Package Includes 1 x 2144 4 x 1/4?-20 Screw 1 x 3/8?-16 Screw 2 x Hex Spanner Product Dimensions: 72 x 70 x 14mm Net Weight: 177g Package Weight: 203g Materials: Aluminum Alloy