Irwin Speedbor 6-Piece Spade Bit Set

Blue-Groove point and cutting edge for faster chip removal. 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. Bit identification is simple with easy-to-read size markings. Standard length. Includes sizes: 3/8', 1/2', 5/8', 3/4', 7/8', and 1'.