Upgrade your guitar with the trusted performance of Grover® 502 Series Roto-Grip® Locking Rotomatics®. The TK-7935 (Allparts #TK-7935) combines Grover’s legendary 18:1 Rotomatic® precision with a convenient thumb screw locking system—delivering rock-solid tuning stability and effortless string changes.
Designed as a direct replacement for most standard 3x3 machine heads, these locking tuners make restringing quick and simple. Just insert the string through the post hole, wrap it once, and secure it by tightening the rear thumb screw. The locking mechanism minimizes string slippage, improves tuning consistency, and enhances overall performance—perfect for gigging musicians, studio players, and anyone who demands reliability.
Finished in classic nickel, the Grover® 502 Series tuners offer timeless style that complements a wide range of electric and acoustic guitars. With all mounting hardware included, installation is straightforward—making this an easy, high-impact upgrade for your instrument.