You switch from wood drilling to concrete or masonry and your wood bits will not even scratch the surface — you either stop the job to get the right bit or you burn through a wood bit trying to make it work and ruin the hole. 7-piece premium percussion/masonry drill bit set. Carbide-tipped percussion bits are designed to fracture concrete and brick with a hammering action while the flutes clear dust from the hole. The carbide tip maintains a sharp cutting edge through hundreds of holes in cured concrete. The set covers the most common masonry anchoring sizes you encounter on concrete walls, foundations, and block walls. Standard on plumbing and electrical rough-in crews working in basements and foundation-level construction across northeast Nebraska and northwest Iowa — the bit set that ha Stocked at Crofton Lumber and Akron Lumber.