The UTG 30mm/2PCs Hi Pro LE Grade Picatinny QD Rings: 22mm Wide is a 4-screw high profile "Tiger" ring. Precision machined from aircraft grade aluminum alloy with Anodized black matte finish. User friendly ergonomic quick detach/lock lever fully adjustable to fit any picatinny rail. High quality synthetic protective tape applied on rings internal surface, tight tolerance control and repeatable locking for re-zero performance.