I was using this on a Stratocaster-type guitar, but I replaced it with a narrower string pitch type to prevent the strings from falling off. Therefore, I am offering the one I was using. Specifications are as follows: String spacing: 10.8mm Steel saddles Block length: 42mm 2-point support system, stud spacing: 56mm The tremolo unit is used, and the other parts are new. The tremolo unit has no major scratches. The box is for a 510TS (please note that it uses 10.5mm spacing). Thank you.