DESIGNED FOR USE ON 6-STRING ELECTRIC AND ACOUSTIC GUITARS. MICROMETER TENSION ADJUSTMENT ASSURES BUZZ-FREE IN-TUNE PERFORMANCE AT EVERY FRET. MICROMETER TENSION ADJUSTMENT ASSURES BUZZ-FREE IN-TUNE PERFORMANCE AT EVERY FRET. PATENTED TRI-ACTION GEOMETRY OFFERS EASY USE AND EVEN CLAMPING TENSION. LIGHTWEIGHT AIRCRAFT-GRADE ALUMINUM CONSTRUCTION. INCLUDES NS MICRO TUNER MOUNTING BRACKET. AVAILABLE IN BLACK, METALLIC GREY, AND SILVER