Check the listing for details. Tuning Machines Locking Custom Shop 3 Plus 3 Black Bitterroot 080230BK. Color: Black, Condition: New. Listed at 55.99 USD. BITTERROOT CUSTOM SHOP LOCKING TUNING MACHINES3 PLUS 3 BLACK SET FOR GUITARBitterroot Custom Shop Brand Guitar Locking Tuning Machines. Our custom shop tuners are used on our custom build guitars. These are an excellent quality tuner at a very reasonable price.3 Right Hand and 3 Left Hand Configuration. Works for many guitar types.3 Plus 3 Setup for GuitarsCustom shop style locking tuners. Solid feel, very clean operation, high quality. Very nice locking tuner setup with internal pin configuration, eliminating pin hang ups that happen with most other locking tuners. Very tight 19:1 gear ratio and stable mast for precise tuning. For that special custom guitar.Specifications:19 to 1 gear ratio, sealed Black locking tuners with Black Knobs.Knob Size is 18.6mm (11/16")Mounting Hole size is 10mm (25/64")Body Size 16.0mm (9/16")Hex nut for mounting bolt 10mm (25/64") Locking mechanism has internal pin to prevent pin hang up.Polished Black, knob is screw replaceable type. Kit includes:3 Right Hand and 3 Left Hand Locking Tuning Machines with Nuts and Washers, 6 mounting screws. Note: (Use #50 drill to seat mounting screws)