The GSP39WB features an screw-in standard wallmounting system and the innovative Hercules Auto Grab System (AGS) yoke: the arms turn in and up with the weight of your guitar to hold it securely and simply open up when you lift it off. Also features a specially designed AutoSwivel yoke, which rotates clockwise and counterclockwise to allow unconventionally shaped guitars and basses to hang vertically. The yoke is completely covered with Specially Formulated Foam (SFF) rubber to protect your guitar"s finish.Screw-in standard wallmounting system Auto Grab System (AGS) yoke AutoSwivel yoke Specially Formulated Foam (SFF) rubber Load capacity: 15.4 lbs. (7kg)