Cogsdill Tool Products, Inc. U series Internal Roll-a-Finish® tools For hole diameters from 2.500 to 4.000 inches (63.5 to 101.6mm). Work length is unlimited; extension adapters can be used to increase work length. Offered in two styles: ■ Through-hole style with helix cage (self-feeding) ■ Bottoming-style for blind hole, with no-helix cage (machinefeeding) ... and available ThroughHole (Helix) from stock. Note: Also available from stock in through-hole, no-helix style. 12 Bottoming (No Helix)