Bi-metal hole saw optimized for cutting steel. It also cuts stainless steel. Cuts precise holes in stainless steel and mild steel, drywall, ceiling tile, laminates, wood and plastic. Longest lasting, fastest cutting blade on the market. Multiple leverage points for easy slug removal. Heavy-duty steel construction includes 5 mil back plate to withstand abuse. Hex-shaped base for easy removal from arbour. Use with Klein Tools Arbor (Cat.No. 31906).