Product Description Hardened alloy steel for bit life, self feed spur for fast material penetration, dual cutting edge for maximum durability in nails with a ball groove shank allows for quick bit changes. From the Manufacturer DeWalt DW1670 15/16-Inch by 6-Inch Ship Auger Bit Self feed spur for fast material penetration Dual cutting edge for maximum durability in nails Hardened alloy steel provides superior bit life 7/16-inch ball groove shank allows for quick bit changes UPC 028874116702 754262192729 Model DW1670 Brand Name DEWALT Shank Type Ball Groove Unit Count 1.0 Count Part Number DW1670 Point Style Spiral Manufacturer DEWALT Material Type Alloy Steel Item Dimensions 9 x 1.38 x 1.38 inches Tool Flute Type Spiral Number of Flutes 2 Warranty Description 1 Year Full Warranty Minimum Bore Diameter 15 Inches Surface Recommendation Alloy Steel Global Trade Identification Number 00028874116702