These were a straight swap for my Gretsch and work well and look good. I can now do bends without the G going out of tune and use the Bigsby too. Happy customer

It did not fit my Les Paul Special ii GT. They seem like great tuners but I was not going to drill huge holes in my brand new guitar. Look great though.

Installed on Ibanez Artcore hollow-body.Obviously, I used the heads and washers from the stock set, because I like the appearance of the mixed metals.The high gear-ratio makes for excellent tuning stability. These would be decent tuners without the locks. The lock mechanism is simple and works perfectly.Some reviews mention the pin not sitting entirely flush with the tuner body. This is irrelevant once strings are in place, and I have not noticed any gaps at the tip of the pin where contact is made whatsoever.I have owned many high-end brand name tuners. With quality craftsmanship and materials, these are comparable to more expensive locking tuning machines.If your guitar has 10mm holes and a 45° angled screw in back, these will definitely work without any modifications.

Installed on an Indio by Monoprice 66 Classic LP perfectly. I like haveing the lock thumb wheel on the back of the tuners with these better than the self locking style.

Let me start off by saying that at $40 these are not the cheapest option out there if you're looking for inexpensive tuning machines. I stayed away from the $15 options hoping to get a better quality product with these....That didn't happen....On the 1st order one of the tuners had a totally stripped post on the locking button. On the replacement order, two of the tuners had bad tuning pegs and another one also had a stripped locking button post. Between the 2 orders I was able to get 6 working tuning machines but with a whole lot of aggravation. I installed these on an inexpensive guitar that I set up for playing slide and they seem to be holding up so far but definitely would not buy again.