Sure grip detachable rings use a four-screw system and have steel caps and an aluminum saddle for added strength.Also features the quick detach system, allowing you to loosen the thumb screws and go to iron sights in seconds.Type: Ring SetTube Diameter: 1"Height: HighSize: 1"Finish: BlackStyle: Quick DetachMaterial: SteelOne Or Two Piece: 2Mount Type: Warne/WeaverLock Type: 4 Screws