Description B2/B3/B4 Guitar String Lockers, String Lock Tuners, Electric Guitar String Switches, Guitar Accessories B2/B3/B4 Guitar String Lockers, String Lock Tuners, Electric Guitar String Switches, Guitar Accessories B2/B3/B4 Guitar String Lock Tuners, Chrome Plated, Guitar String Lock Tuners, Guitar Accessories, Electric Guitar String Switches Features: 1. Solves common tuning problems for 3+3 headstock guitars: This guitar string lock tuner effectively solves common tuning problems for 3+3 headstock guitars. 2. Patent-pending string control design for guitar headstock mounting: This patented string control design mounts on the guitar headstock and corrects the angle of the strings as they pass through the bridge. This ensures proper string alignment and improves tuning stability. 3. Significantly Improved Tuning Stability, Superior Performance: This guitar lock-up tuner significantly improves the instrument's tuning stability while providing superior performance. Say goodbye to frequent tuning and enjoy a more stable playing experience. 4. Durable All-Metal Chrome-Plated Guitar Fittings for Years of Trouble-Free Use: This all-metal chrome-plated guitar tuner is made of durable materials and is designed for years of trouble-free use, ensuring reliable performance and a long service life. 5. Upgraded Roller Mechanism Reduces Friction When Guiding Strings to the Tuning Screw: This upgraded guitar tuner uses a roller mechanism to ensure low friction when guiding strings to the tuning screw. This minimizes interference with string pitch and optimizes overall tuning accuracy. Specifications: Origin: China Type: Tuner Model: Guitar Accessory Contact Type: None Material: Zinc Alloy (Metal) Surface Treatment: Electroplating Gross Weight: B2: 22g, B3: 25g, B4: 34g Colors (Optional): Black B2, Silver B2, Gold B2, Black B3, Silver B3, Gold B3, Black B4, Silver B4, Gold B4 Note: Due to differences in monitors and lighting, the actual color may slightly differ from the picture. Thank you! Please allow 1-2cm measurement error due to manual measurement. 1 x Guitar Locking Machine