Product Features UTG Tactical Flashlight Ring with 45 Degree Offset Angle for Optimal Low Profile Center Bore Alignment Offset Angle Designed to Support Modern Shooting Techniques and Allows Clearance Of Most Front Sight Post Styles While Mounted On a Top Picatinny Rail Light Weight, Precision Machined Aluminum with Anodized Black Matte Finish Integral Max Strength Twist-lock Mount to Fit on any Picatinny/Weaver Rail Complete with 2 Spacers to Accept 27mm, 25.4mm(1"), or 20mm Tube Light Device Product Specifications Warranty: Lifetime No. of Pieces: 1 Materials: Aluminum Color(s): Black Compatible with: 20mm, 27mm, 1" Flashlight Tube Diameters Parts Included: Hex Wrench 3 mm Mount Type: Picatinny