Lenox, 1-1/8", Carbide Hole Saw, High Performance Carbides Welded To The Cutting Edge For Durability Tooth Loss Prevention, Extremely Versatile, Aggressive Tooth Design Drills Through Wood, Steel, Stainless, Cast Iron, Fiber Cement & Plaster, Fast, Easy Plug Removal, Patented Speed Slot Staircase Design Has Multiple Leverage Points For Easy Plug Ejection, Drills Through Thick Materials In One Pass.