The device is a pair of rubber grippers similar to the arrow gripper on the quiver, these rail grippers are mounted to a machined aluminum bracket that permanently mounts onto the bow. The two aluminum guide rails that separate the hood from the arrow gripper press snugly into the rail grippers anywhere along the length of the guide rails for infinite vertical adjustment of the quiver. This means no more mud in your arrow nocks when you stand your bow on the ground and the soft rubber mounted rail gripper is the best vibration dampener you'll ever put on your bow. The Soft Loc is reversible for right or left hand and may be rotated about 15 degrees if you like your arrows tilted back toward you.