Ship Auger Drill Bit: Equipped with a dual-helix cutting edge, the long ship auger offers fast, reliable and smooth drilling applications for all kinds of timber and wood leaving a cleanly drilled hole Durable: The IDEAL long ship auger has a black oxide coating and is made from hardened machine steel making it durable and resistant to corrosion. The dual cutting edges and powerful screw tip power through nails and other embedded metals without breaking Effortless Drilling: The oversized cutting head and the tapered dual flutes allow for easy chip removal without pulling back. Its dual-helix cutter head provides twice the cutting surface per rotation requring less effort to drill Clean And Quick: The dual-helix auger bit has a unique 60 deg. angle design which shears through wood cleanly without excessive chipping. The oversized lead section pulls through the wood quickly while the tapered shaft removes the chips efficiently Product Specifications: The IDEAL Nailbiter auger has a diameter of 3/4 in., over all length 7.5 in., twist length 5.0 in., 7/16 in. shank and dual flute design with quick change shank