ABM 2500c Bridge, Nashville Tom-Style Electric Guitar Bridge, The riders are supplied without a notch so that the string can be perfectly adapted to your instrument, String spacing: 52 mm, Bolt distance: 74 mm, Radius: 305 mm (12""), Material: Solid bell brass, Surface: Chrome@+*Including:*@+@+, Bolt 4 mm to M5, M5 punch sleeves (Nashville), Replacement saddle, Replacement snap ring, Replacement screw, Allen key