TUSK Spade Drill Bits are manufactured from High carbon steel and used for rough boring in wood. TUSK Spade Bits feature spurs that scribe the outside of the hole, reducing breakout, resulting in a faster cut and cleaner holes. Suitable for drilling in Hard wood, Soft wood, Chipboard, MDF and Plywood. Tip: To avoid splintering, drill the work piece from both ends. Quick change shank fits all standard 1/4" quick change chucks.