The new Lenox carbide-tipped hole saws are designed for cutting tile and stainless steel up to 50x longer than previous generations of Lenox bi-metal hole saws. These high performance carbides are welded to the cutting edge for durability and to help prevent tooth loss. They are extremely versatile due to the aggressive tooth design which drills through wood, steel, stainless, cast iron, fiber cement, and plaster. The patented SPEED SLOT staircase design has multiple leverage points for easy plug ejection. Because of it's tall body, the hole saw easily drills through 2x dimensional lumber for rough-in work.