Irwin Tools 1768411 Short Spade Bit Set (6 Piece) Drill bits feature a Blue-Groove point and cutting edge for fast chip removal Spade bits use double-cutting spurs that scribe the outside of the hole, reducing breakout Flat drill bit design features a large shank for added durability Grooved hex shank helps prevent slipping in the drill chuck or bit extension Drill bit set includes 3/4", 7/8", 15/16", 1" and 1-1/8" short-length bits and a 6" OAL quick-change extension