Gotoh Locking Tuners (SD91-MG)  6 In-Line Vintage Style Tuning Pegs  Electric and  Acoustic Guitar Machine Heads  Nickel IMPROVED TUNING METHODS: Our guitar tuning pegs make keeping vibrato-equipped guitars in tune with ease by eliminating the need for string wraps around tuning machine posts. SELF-LOCKING DESIGN: Strings are locked to the post, requiring only a half turn to bring them into pitch. Strings return to original positioning after bending or slackening during dive bombing. ENHANCED PERFORMANCE: These Gotoh Locking Tuners are easy to install and even easier to manage. They can help increase sound performance and efficiency without sacrificing durability or ease of use. HARDWARE INCLUDED: Designed for a 1:15 gear ration, everything you need to mount your new right-handed locking tuners comes standard with every order, including the mounting screws. SATISFACTION GUARANTEE: We promise you a high-quality product, which is why our locking tuners come with a 30-day money back guarantee and a manufacturers warranty.