1" X 5/16" Pilot Hole HSS Straight Shank Counterbore Quantity:1 Part Number GLBCOX1218

Part Number GLBCOX1218

Part Number DWDTS2-11/16

Part Number DWT60891

Part Number: EZ-M1011

tapered nose with fine tip

1" X 5/16" Pilot Hole HSS Straight Shank Counterbore Quantity:1 Part Number GLBCOX1218Product 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