These are the nicest most welled made tuners ive owned for the money. The UMP plate is a brilliant idea. I used these on a les paul kit and the holes where not pre drilled which for me not a big deal but with the mounting plate. I didn't have to worry about alignment and drilling and depth just bolt them on and perfect. If your replacing tuners on a guitar you already own no worry of matching up screw holes or plugging and redrilling. For around $40 you you can't get better working or looking tunners imo. I've bought decent no name locking tuners for half the price before which if you search and read and get lucky you get good ones but most are junk and who knows how long the good ones will last but I believe this tuners will last and work forever just blown away.