R8 Tool Holder for 12,000-Series. Without Oil Inducer. Converts CNC machines, drill presses and mills to accommodate Hougen 12,000-Series cutters. Hole capacity 2-3/8 dia. x 2 D.O.C. Converts CNC machines, drill presses and mills to accommodate Hougen 12,000-Series cutters. Hole capacity 2-3/8 dia. x 2 D.O.C. Made in USA. . .