Diablo Carbide-tipped hole saws cut both wood and metal (wood, nail-embedded wood, plastic, aluminum, metal, cast iron, stainless steel and metal). Delivers a longer cutting life than bi-metal for faster cutting performance and increased productivity.Variable Tooth Design for faster cuts. SnapLock Plus mandrel system for quick and easy changes with no downtime. One size fits all In. mandrel fits all Diablo holes saws in the carbide and bi-metal range, from 5/8 Inch to 6 Inch diameter. Tool-free plug ejection for fast material removal.