Irwin 341008 8pc Speedbor bit set

Irwin 341008 Speedbor 8 Piece 3/8-Inch to 1-1/2-Inch Spade Drill Bit Assortment IRWIN Speedbor Eight Piece Set includes 3/8", 1/2", 5/8", 3/4", 1", 1-1/8", 1-1/2". 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. Fits all standard quick change chucks