Solid Pilot Counterbores keep the counterbore centered in the hole to ensure a level seat. It is also be used for spot facing, typically in metalworking tasks. Travers host High-Speed Steel (HSS) and Cobalt Steel Counterbores, heat-treated throughout, and precision ground to exacting size and concentricity tolerances. Get Counterbores with built-in Pilot in sizes of 1/64 inch oversize, or 1/32 inch oversize, or On-size pilots. We offer it in sets of 5-pieces, 6-pieces, or 7-pieces. It contains multiple solid pilot counterbores in a range of metric or inch sizes including 1/4 inch, 5/16 inch, 3/8 inch, 7/16 inch, 1/2 inch, or 3mm, 4mm, 5mm, 6mm, 8mm, 10mm. High-speed steel counterbores are the most common choice for creating a flat-bottomed cavity. Cobalt steel counterbores provide more wear resistance at high speeds than high-speed steel counterbores and are suitable for machining hard materials. We offer two versions of Cobalt Steel Solid Pilot Counterbores: M35 Cobalt, M42 Cobalt. Solid Integral Pilot Type Counterbore Sets come in a wooden or plastic case for the convenience of storage. Choose from 14 different Pilot Type Counterbore Sets from brands like KEO, Weldon & TTC Productions only at Travers.