WOOD BITS IRWIN "SPEEDBOR" Faster, cleaner bore in hard or soft woods, plywood or plastic with less power. Made of one piece special high carbon steel. Bits hollow ground, hardened full length. Hole in head for hanging. 1/4" shank, with 3 flat sides. Full polished. Sizes marked on heads. 6 1/2" overall length. Size: 1 1/8", Ctn. Qty.: 6, Ctn. Wt., Lbs.: 2 3/4