This is an ABR-1 Tune-O-Matic bridge made by the famous Kluson, known for their pegs. It's nickel-plated, non-wired, and features brass saddles. This is a new item, with the saddles converted to flat-head type and pre-grooved, so it's ready to use immediately and will last for a long time. It's an inch standard, so it's a Gibson compatible part. Kluson-made bridges are slightly heavier than Gibson ones, resulting in a tighter sound. The build quality also gives a more solid impression than Gibson. About Flat-Head Saddles: These saddles were used on ABR-1 bridges before they became wired, and up until around the time of the Nashville bridge. They were used on guitars like: Clapton's Psychedelic SG Andy Powell's Flying V Johnny Winter's Firebird And the Les Pauls of Jimmy Page and Randy Rhoads. I think it's an important part for reproducing the sound of those famous guitarists. If you're not satisfied with just changing pickups, you might find it interesting to focus on the bridge and saddles! Currently, Gibson doesn't offer flat-head saddles. Vintage Maniacs once sold a limited number of them when they featured them in a special article. #gibson #fender #PRS #Epiphone #zemaitis #ESP #Gretsch #Rickenbacker #Suhr #tokai #Fernandes #Fujigen #Greco #electricguitar #guitarrepair #guitarparts #guitarcraft