Description: The HERCULES Guitar Stand GS415B PLUS features the upgraded foldable Auto Grip System (AGS) yoke, Instant Height Adjustment Clutch and Specially Formulated Foam (SFF) rubber on all contact points Features: The folding built-in Auto Grip System safely locks the instrument in place. The Upgraded AGS yoke is designed to accommodate more guitar neck sizes from 40 mm – 52 mm (1.57” - 2.05”) including classic, acoustic, electric and bass guitars. The attached NINA (Narrow Instrument Neck Adjustment) are specially designed to increase the thickness of AGS arms to accommodate narrow neck instruments from min. 28 mm (1.10”) like banjos and mandolins. The Instant Height Adjustment Clutch with Locking Pin adjusts stand height quickly, easily and securely. Specially Formulated Rubber Foam fully protects the instrument at all contact points..