Cool diamond on the string bar like on some of your fave old Gibsons! Heavy string bar is 83.14mm wide, 10mm string to string spacing. I measured 140mm length from the front of the string bar to the back side of the hinge. Hinge is held tight to the wire frame by string tension. Mounts to end of guitar by two oval head screws and one strap button with an appropriate screw. We include three nickel plated steel mounting screws as depicted.