Let's face it, upgrading your guitar's tuners is only slightly less of a hassle than dealing with the old, worn out, inaccurate or broken tuners you have now! Finding the right aftermarket tuners that match up with your guitar's mounting hole pattern can be a guessing game and if your new tuners don't match, you're stuck drilling new holes, filling the old holes and screwing in the new tuners.
The UMP™ is a patent pending adapter plate that fits between your Hipshot tuners and the headstock of your guitar. Tabs on the face of the plate prevent the tuners from slipping against the headstock. At the same time, reach nuts inserted through the existing headstock holes into the tuners keep the whole assembly securely in place. This means that the tuners, interlocking as one unit, use the headstock holes themselves for stability rather than individually drilled locator pin or mounting screw holes. Upgrading to the most precise tuners in the market is really as simple as orienting the plates on the headstock, inserting the tuners through the plates into the headstock and tightening the reach nuts and washers from the front.
Check out the Installation instructions