Looking for a way to maximize your guitars tuning stability? Grovers Roto-Grip Locking Rotomatic 509 tuners boast a rock-solid string locking mechanism to facilitate easy string changes and to keep your tuning exceptionally stable.Specifications

• 18:1 Rotomatic design for smooth adjustment and precision tuning
• Rock-solid locking design with thumbscrew
• Includes mounting hardware for easy installation
• Elegant chrome finish
• 3+3 layout