From your classical acoustic to your soprano uke, the Hercules GSP38WB Plus is the convenient way to mount guitars and stringed instruments in your studio, office, or rec room. Herculesâ AGS (Auto Grip System) Yoke safely grips instruments as theyâre loaded in, up to 2.01" in width, and features an attractive wood mounting base to complement your fine wood instruments. Included with the GSP38WB Plus is the N.I.N.A. (Narrow Instrument Neck Adjustment) accessory, which accommodates ukulele, banjo, mandolin, and violin necks as narrow as 1.1". For looks, security, and ease of use, Sweetwater Sales Engineers stand behind our Hercules GSP38WB Plus wall hangers.