Leupold QRW2 1in Scope Rings - High - Detachable mounts, crafted from durable steel. The updated industrial design gives you more contact with the base for added stability and easier installation. QRW mounts bring Leupold accuracy to the cross-slot format. They feature steel detachable accuracy mounts that are based on the familiar cross-slot design. Use the QRW mounts to achieve detachable accuracy. Cross-slot base rings are engineered specifically to match up with cross-slot bases. We recommend you mount these incredibly stable rings on firearms such as tactical shotguns with built-in mounting rails.