Feature SCTM-66 25.4mm 1" One Piece Cantilever High Picatinny Mount Comfortable 50mm (1.97") Central Height Fits Shooters Even Wearing a Mask Secure Four-Screw Rings Provide Strong and Consistent Clamping Force Built-In Picatinny Rail on Ring Top Allows Easy Red Dot Sight Installation One-Piece Mount Design for 1-Inch Rifle Scope Tube on AR15/M4 Platforms Specification SCTM-66 25.4mm 1" One Piece Cantilever High Picatinny Mount Specification Details Ring Dia: 25.4 mm / 1 in Height: 76 mm / 2.99 in Central Height: 50 mm / 1.97 in ( Bottom to Center ) Length: 156 mm / 6.14 in Mount Length: 80 mm / 3.15 in Material: 6063-T6 Aluminum Alloy Weight: 163 g / 5.75 oz Mount: Picatinny Finish: Black Matte Items in the Package: Hex Key Size