Precision CNC machined from solid aircraft-grade aluminum. Mounting screw: 1/4-20″ Dovetail Width: 39mm Upper Width: 64mm Weight: 63g Length 75mm Height 13mm Manufactured specifically for the Canon EOS-1D X Product Features: 1. Precision machined from aircraft-grade aluminium. 2. High quality surface anodizing, solid and durable. 3. Convex edge prevents movement. 4. Strap mount. 5. Includes 2 safety stop screws, 1 x 1/4" screw and allen wrenches.