7/8" X 1/2" Pilots for Counterbore Quantity:1 The bits are made from

The bits are made from S2 steel that's heat-treated to 57–63 HRC to help maintain their geometry under stress

Part Number: BIT-DEWSFC1-100

3–19 mm flat end hex L-keys with holders and racks

Cut Style Center Cutting

permanent connection that can't loosen over time

7/8" X 1/2" Pilots for Counterbore Quantity:1 The bits are made fromProduct Description Counterboring is the enlargement of a portion of a hole that has previously been formed. If the counterbored portion is shallow (1 8" or less), the operations is usually known as spot facing; for example, a flat seat for a bolt head or nut. If, on the other hand, the hole is enlarged to a considerable depth, it is designated as counterboring. These counterbores are made of two piece construction, having an integral shank and