Grover 505 Series Mini Roto-Grip Locking Rotomatic Tuning Machines, Chrome, 505C6, 6 In-Line

The Grover 505 Series Mini Roto-Grip Locking Rotomatic Tuning Machines are a smaller version of the regular size Roto-Grip lockers for the in line and smaller headstocks or for those who prefer a lighter feel. These locking machine heads utilize the famous 18:1 Rotomatic design with a "thumb screw" mechanism which locks the string into place.Insert the string through the post hole, wrap around once, then lock by tightening with the thumb screw.