[Hollowed-Out Design & Built-In Tape Protection] See-Through Style, Provide Potential Visibility For Open Sights, Meanwhile Hollowed-Out Configuration Helps To Release Heavy Duty When Clamping Your Scope [Premium Aircraft Aluminum, Solid & ]Precision machining of aircraft grade 6061 aluminum alloy + high strength aluminum in black matte Sturdy & construction, build no wobble, offer safe performance in . Robust and User Friendly Ergonomic Quick Detach/Lock Lever Fully Adjustable to Fit on Any Picatinny Rail Tight Tolerance Control and Repeatable Positive Locking for Optimal Re-zero Performance Specifications: Double Nail Height Width Colour:Black Material:Aluminum Alloy Package Contents: 4x Flashlight clip 1x wrench Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.