Irwin 3046012 Drill Bit 2-1/4 in Dia 5 in OAL 3-Flute 7/16 in Dia Shank Hex Shank

Feed screws has a coarse thread for fast boring. Spurs on the outside diameter cut holes clearly and accurately, 7/16 in quick-change impact shank for use in applications such as large diameter holes in wood for pipe, conduit. Each bit is packaged with one hex key and two feed screws.