classic Profile Race cranks in gloss blackright arm has sprocket bolt hole / bosscan be used with:RHD: any bolt drive sprocket with 19mm boreRHD: any bolt drive sprocket with 22mm, 15/16”, 24mm bore with 19mm adapterRHD or LHD: any Profile or Madera 19mm spline drive sprocketRHD or LHD: any sprocket that uses a Profile 19mm spline drive insert- - - - -includes:GDH cromo or GDH titanium 19mm spindle *cromo, aluminum, or titanium spindle bolts (use 6mm hex) *cromo or titanium sprocket bolt **installation / removal tool* titanium spindle and aluminum or titanium spindle bolts additional cost* 5.625" for Mid, American / USA, Spanish, and internal Euro bottom brackets* 6.00” for 68mm and 73mm external Euro bottom brackets** titanium sprocket bolt additional cost