The Hercules Violin/Viola Hanger DSP57SB utilizes the Auto Grip System (AGS) yoke and features a slat-wall base. The built-in Auto Grip System safely locks instrument in place. Specially Formulated Foam Padding fully protects instrument at all contact points. Slat wall mounting system. Load Capacity: 5 kg. Fits 1/4, 3/8, 1/2, 3/4, 7/8, 4/4 size violins and 12" - 17” violas