Quick Release Plate Clamp Adapter with QR Plate 1/4 inch Screw 1/4 & 3/8 inch Screw Hole Bubble Level for Tripod DSLR Cameras Features:   Quick release plate clamp made of aluminum alloy material, adopts CNC precision machining. Standard 3/8 inch screw hole and with a screw hole adapter(3/8 to 1/4 inch), can be mounted onto tripod head and other devices easily. Including one quick release plate with 1/4 inch standard screw and anti-slip rubber pad, easy to install your camera. With locking knob and double security locking button, safe and reliable. And the bubble level can help you find balance quickly and accurately.                                                                                        Specifications: Material: Aluminum Alloy Item Weight: 136g / 4.8oz Package List: 1 * QR Plate Clamp with QR plate