I bought this to replace the wrap-around tail piece on my 1997 Epiphone SG Junior P90 model guitar. It was a perfect drop in fit. There are some differences between the original parts and the Musiclily parts. The bridge post screws are shorter than the original bridge posts. The collar around the top of the bridge post inserts is more narrow on the Musiclily post inserts, and the bridge post screw tops are a touch bigger and more rounded on the Musiclily bridge posts. With this said, all the parts were interchangeable with the existing (original) hardware meaning I didnt have to remove the existing bridge posts or bridge post inserts and I could mix/match any of the parts and everything fit together. The Musiclily bridge posts are shorter, but that doesnt make any difference as there is no way you will need to raise the bridge high enough that the shorter posts will become an issue. I used the existing (original) bridge post inserts because the collar around the opening of the bridge post inserts that rests against the body is wider and it covered some drill marks in the finish from the bridge posts being drilled. The collar on the Musiclily post inserts is more narrow. But I used the Musiclily bridge posts because the original posts were chewed up.The Bridge itself is exactly like the original bridge with one exception - the Musiclily bridge has grooves in the intonation ridge for the strings to lay in. I am not sure if thats better or worse but on the original bridge, the strings had already cut this groove into the bridge leaving the edges sharp so maybe this is better.I bought this expecting to change out the entire original bridge hardware because after 27 years of playing, the original bridge and bridge posts were chewed up. This was a perfect fit and the only parts not used were the bridge post inserts and that was for cosmetic reasons, not fit or function. I highly recommend this bridge hardware for these Epi Junior models***Before asking questions, get a caliper and measure your hardware yourself - the measurements don't lie. I have had enough experience of "eye-balling" parts and then getting things that dont fit (I have a box of those parts as proof). I took detailed measurements using a $10 caliper before ordering this and I got perfect fit hardware the first time.***