2-7/8" X 1/2" Pilot Hole HSS Taper Shank Counterbore Quantity:1 Part Number: BIT-DAM4X7/16

Part Number: BIT-DAM4X7/16

Size 1-3/16"-12

Part Number: Assortment Kit #211

Carbide tips brazed to tough steel bodies and are larger than the nominal drill size to provide clearance for installation of anchor screws

2-7/8" X 1/2" Pilot Hole HSS Taper Shank Counterbore Quantity:1 Part Number: BIT-DAM4X7/16Product 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