51/64" X 1/4" Pilot Hole HSS Straight Shank Counterbore Shopify Collective The striking faces on the

The striking faces on the hammers are made of 4140 chromium-molybdenum steel that's heat-treated to 52 HRC

Part Number: BIT-POUM2

Part Number DWC5-530-213

Part Number DWTSMR1316-5

Part Number: 75C1000WA2G

51/64" X 1/4" Pilot Hole HSS Straight Shank Counterbore Shopify Collective The striking faces on theProduct 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