1-1/4" X 3/8" Pilot Hole HSS Straight Shank Counterbore Quantity:1 Body Diameter 7/16"

Body Diameter 7/16"

Number of Compartments: 18

Part Number DWRRB1HEX

Part Number: M12C80ASB12BO

Part Number DWDRSD1-3/64

1-1/4" X 3/8" Pilot Hole HSS Straight Shank Counterbore Quantity:1 Body Diameter 7/16"Product 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