Quick Clamp QR Clamp Plate With 1/4" - 3/8" Screw Adapter for Tripod Head Ear: 12x8 cm/4.7x3 inches Metal structure, precision forging, very accurate anode machining There is 1 / 4-3 / 8 "adapter screw on the bottom, can be widely used for a variety of professional monopod tripods Aluminum clamp adapter with most of the ball heads compatible with quick release plate give you the freedom to shoot the camera out of the head without detaching it from the plate and attaching it to other Acra-Swiss style systems Can be used with a tripod, rail, stabilizer and various photo equipment Quickly switch between different devices without replacing the quick release assembly - Inner mesh panties Product Size: 85 x 50 x 20 mm （L * W * H） Quick Release Plate Size: 60 x 38 x 10 mm （L * W * H） Material: Aluminum Alloy The package includes: 1Piece X Quick Release Adapter 1 pc. X Quick Release Plate 1 Piece x 1/4 - 3/8" Screw Adapter （Without Monopod）