Quick Detach Picatinny Scope Rings (20mm Weaver Rail, Low Profile, 30mmto 1 Inch Diam, 4-screw) M57 Quick Release Lever allow fast installation & detachment Fits 30mm /(25mm) adjustable Diameter O-Ring Scope Suitable for 30mm/25mm (1") Tactical Flashlight & Laser Sight Tube Mounting Need Item includes:1 x Quick Release O-Ring Scope for Weaver Picatinny Rail 1 x Hex Wrench