Specifications ◆ Model Name: GE101T ◆ Finish (Color): C / Chrome ◆ Type: Tremolo Unit ◆ String Pitch: 11.3mm ◆ Contents: Tremolo body, arm, mounting screws x6, springs x5, spring holder, holder set screws x2, wrench, instruction manual This is the GOTOH GE101T, a 6-point synchronized tremolo unit. It is also installed on high-end brand guitars. The screw spacing for mounting is 11.2mm, which is a common metric standard. However, after purchase, I realized it wouldn't fit my Stratocaster, so I'm selling it. GOTOH's official website has a dimensional chart, so please check it carefully to avoid making the same mistake I did before considering a purchase. I opened the package, but I realized it was the wrong size before installing it, so it's unused. Thank you.