Specifications ? Ring Style 1: High Profile - 0.71 Inch - 2 Pcs ? Ring Style 2: Medium Profile - 0.50 Inch - 2 Pcs ? Material: Aluminum Alloy ? Ring Diameter: 1 Inch ? Rail Type: 21mm Picatinny Rails Package List ? 2 x 1'' High Profile Scope Rings (Optional) ? 2 x 1'' Medium Profile Scope Rings (Optional) ? 1 x Allen Wrench ? 1 x Spare Screw

Clamp Screw Design & Easy To Install?With 1 rail clamp screw and 2 scope clamp screws per side, ensure mount any 1'' scope firmly, just twist on/off the rail clamp screw nut via allen wrench and mount the base on 21mm rail, simple and quick to remove or install. Comes with 1 pcs allen wrench and 1 pcs spare screw. High Quality Aluminum, Solid & Durable?Precision machining of aircraft grade 6061 aluminum alloy + high strength steel in black matte anodizing finish. Sturdy & lightweight construction, build no wobble. Hollowed-Out Design & Built-In Tape Protection?Design in see-through style, provide potential visibility, and hollowed-out design helps to reduce unnecessary weight. Built-in tape inside per rings to prevent from marring the scope, also prevent sliding and holding postion accurately. 1 Inch Scope Rings?Perfect fit for 1" scope. 2 Pcs Medium Profile: 0.5'' height from base of mount to bottom of ring, Item Height 1.9'', Dimension 1.9 x 1.6 x 0.8 Inch, Weight 2 Oz per ring. Perfect for All 21mm Picatinny Rails?LONSEL 2 Pcs Medium Profile 1'' Picatinny Scope Ring, fit for standard picatinny rails, perfect for mounting most scopes which are In 1''/ 25.4mm scope tube.