Irwin Speedbor Standard-Length Spade Bit Set (5 Piece)

Spade Bit Sets, Blue-Groove point and cutting edge for faster chip removal - 4x faster than standard spade bits, Double cutting spurs scribe the outside of the hole reducing breakout. Features: Spade Bit Sets Blue-Groove point and cutting edge for faster chip removal - 4x faster than standard spade bits Double cutting spurs scribe the outside of the hole reducing breakout 10% larger shank for added durability Grooved hex shank prevents slipping in drill chuck or bit extension Set includes: 3/8", 1/2", 5/8", 3/4', 1" Shank length 6", Shank size 1/4"