Hercules Auto Grip System (AGS) Violin Viola Hanger Harmonica and Vintera Modified Series Stratocasters SR203 and Vintera Modified Series Stratocasters and combines modern two point synchronized tremolo design with classic Fender® looks Noise is further reduced by the inclusion of an AC adapter that moves the AC DC conversion outside of the chassis where its impact on the signal chain is limited The Auto Grip Violin Viola Wall Hanger from HERCULES Stands has a wooden base that can be mounted onto most walls to hang your instrument and the Auto Grip System (AGS) safely locks your instrument in place by utilizing the instrument's weight to engage the grip system