Purchased as replacement parts for a PRS SE McCarty 594. I really disliked the amount of lash in the OEM tuners. These have so little lash that it's not worth complaining about. You will likely use the bushings that came with your guitar, so check carefully before removing them with the OEM tuner hardware. You wouldn't want to knock them out only to have to re-seat them again. Knocked off two stars for the cheap plastic knobs. At this price point one should expect better. Another thing with mentioning is this: Two of the screw holes on my headstock were stripped at the factory. And, all of the screw holes were damaged by over-tightening. This is a major time cost hidden beneath the tuning hardware. I'll never make that mistake buying an SE anything again.