Irwin Tools 1764343 Short Spade Bit (4 Pack), 5/8" Blue-Groove drill bit point and cutting edge for fast chip removal Wood drill bit uses double-cutting spurs that scribe the outside of the hole, reducing breakout Flat drill bit features a large shank for added durability Grooved hex shank helps prevent slipping in the drill chuck or bit extension Fits most standard quick-change chucks Blue-Groove drill bit point and cutting edge for fast chip removal Wood drill bit uses double-cutting spurs that scribe the outside of the hole, reducing breakout Flat drill bit features a large shank for added durability Grooved hex shank helps prevent slipping in the drill chuck or bit extension Fits most standard quick-change chucks