Gotoh SD91-05M MG-T Locking 6L B, Locking Machine Head Set for Electric Guitar, Vintage F-Style, Gotoh MG-T traditional locking system with a knurled screw on the back of the machine head, Configuration: 6 Left, Semi-closed construction, Buttons: Butter Bean metal, Gear ratio: 1:15, Shaft length (to string hole): 18.5 mm, Second shaft length (staggered): 20 mm, Bore: 8.8 mm, Attachment: Screw, Screw tab angle: 90° and 180°, Surface finish: Black Chrome, Includes fastening screws and push-in sleeves for 8.8 mm holes, Made in Japan