With the Peak Design PROdrive Screw, attach any Peak Design strap directly to the tripod mount on your camera without using a Peak Design quick-release plate. You can also hang any camera/lens/accessory combination securely from the PROdrive screw. The Screw is made of tamped carbon steel with a black oxide finish and is strong enough to hang any professional camera/lens combination. The round non-twist pad and hex-drive wrench (included) allows you to torque the PROdrive screw securely against your camera body in a way that resists backing out over time. The D-ring folds flat when not in use. Also works with other sling-style straps like those made by Black Rapid.