1-1/4" X 3/8" Pilot Hole HSS Straight Shank Counterbore Quantity:1 Part Number: BIT-SDS588

Part Number: BIT-SDS588

Part Number DWDRSD1-3/64

Part Number DWRRB1HEX

Size: 29/64"

clamp the drop mallet in a vise so the jaws grip the sides of the insert firmly

1-1/4" X 3/8" Pilot Hole HSS Straight Shank Counterbore Quantity:1 Part Number: BIT-SDS588Product 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