Specifications ◆ Model Name: GE101T ◆ Finish (Color): C / Chrome ◆ Type: Tremolo Unit ◆ String Pitch: 11.3mm ◆ Contents: Tremolo unit 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's a reliable item, also used in high-end brand guitars. Made in Japan, it's a high-quality, premium part from GOTOH, a renowned manufacturer! There's no other company in Japan that can produce products of this quality. The screw spacing for mounting is 11.2mm, a common metric standard. Many models can be swapped out directly. You can confirm the dimensions on the official GOTOH website for certainty. The nut and bridge (tremolo unit) are where the vibrations of the strings are first transmitted. If you cut corners here, even a good wood body and neck won't matter. Please refer to the official GOTOH website for the diameters and sizes of each part.