The PRL-8421 is a right-handed set of Locking RATIO® Calibrated Machine Heads for a Music Man, or other 4 x 2 style headstocks.
It has a two-pin casing that can be used as is, or with Graph Tech’s Patented InvisoMatch Mounting Plates. 4 different sets of InvisoMatch mounting plates in brushed aluminum are included to make installation on most guitars fast and accurate by using your existing screw mounting holes.