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's a reliable item, also found on 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 higher quality. The screw spacing for mounting is 11.2mm, a common metric standard. Many models can be swapped out directly. Please refer to the GOTOH official website for a dimensional chart to confirm compatibility. The nut and bridge (tremolo unit) are the first points where the vibrating strings' energy is transmitted. If you cut corners here, the quality of the body and neck wood won't matter. Please refer to the GOTOH official website for the diameters and sizes of each part.