Super tough bimetal bit that doesn't freak out over nails. Perfect for drilling into nailed wood and it's 50 times tougher than regular bits for nailed wood. BITS FOR WOOD AND NAILED WOOD - Cleaner hole with less tear-out SPIRAL TIP - Faster drilling with less effort CONICAL THREAD - Cuts down on friction. Tri-Flute design clears chips super effectively FULLY HARDENED - Boosts durability1/4" QUICK CHANGE HEX SHANK - Quick and secure hold