13-piece universal set for heavy-duty carbide hole saws. The Endurance for Heavy Duty hole saw offers a lifespan 20 times longer than any bi-metal hole saw made from the toughest materials. The carbide technology provides additional heat resistance for greater endurance. Furthermore, the teeth of the saw are individually welded, making them extremely durable. Use this hole saw when drilling holes in wood, drywall, brick, plastic, metal, non-ferrous metal, stainless steel, abrasives, and soft tiles. It is suitable for all corded and cordless drill drivers.