Large Ball Head Tool Body .375" (9.53mm)
Precision Ground Wide Ball Head for use with .385 Top Size Valve Guide Pilots and R3-2003 Wide Body Ball Head Tip Holder 1.575" - 2.362" (40mm-60mm) or
R3-2004 Wide Body Ball Head Tip Holder 2.385" - 3.150" (58mm-80mm)