UTG 1 Inch Quick Detach/Lock Universal Picatinny Rings, RQ2W1204.pbr br- 4-screw High Profile "tiger" Ring.brbr- Machined from Aircraft Aluminum Alloy with Heavy Duty Steel Locking Plate for Maximum Strength Holding Zero.brbr- Twist Lock Design for Quick and User Friendly Easy Installation.br br- Light Weight With See-through Tunnel and Slot Cut on Ring Top.brbr- High Quality Synthetic Protective Tape on Rings' Inner surface to protect your Equipment.brbr- Optimized Dimensions for Best Fit on All Picatinny/Weaver Rails.brbr- Strong Recoil Stop Cross Bolt for Optimized Fit and Zero.