This is an Edge III tremolo bridge, which was equipped on the mid-range Ibanez RG350 models in the late 2000s. It seems to be a rare item, as I couldn't find any others listed on Mercari. The structure is similar to the Lo-Pro Edge, with the fine tuners moved back and a 30mm block to accommodate a thinner body. It's a high-quality bridge with excellent precision, functionality, and design. It's a double-locking system where you cut the ball ends of the strings to install them. The string spacing is 10.8mm, the stud spacing is about 74mm, and the block length is 30mm. It shows signs of use, but I think it's relatively clean. No returns or exchanges after purchase. Disassembled and cleaned. Springs are included. Tremolo arm is not included. Thank you for looking.