Aluminum Alloy Quick Release Plate Clamp Adapter with QR Plate 1/4 Inch Screw Connector Built-in Bubble Levels for with Bottom 1/4 Inch & 3/8 Inch Screw Hole for Tripod Monopod Features:                                                Aluminum alloy quick release plate clamp, CNC precision machining and surface adopts anode anti-oxidation treatment. 38-42mm adjustable jaw, compatible with most Arca-Swiss standard quick release plate. 38mm standard groove design, and has standard 1/4 inch & 3/8 inch screw holes at the bottom, can be mounted onto tripod head easily. Including one quick release plate with 1/4 inch standard screw and anti-slip rubber pad, easy to install your camera and keep it safe. Built-in one horizontal and one vertical bubble level to help you find balance accurately and quickly.                                                                                           Specifications: Material: Aluminum Alloy Color: Black Item Weight: 58g/ 2oz Package List: 1 * Quick Release Plate Clamp 1 * Quick Release Plate