Speedbor Spade Bit Set 341008 Features: 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 341008 Contents: 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/2"Shank Length: 6"Shank Size: 1/4"