M42 cobalt teeth last 3X longer*, cut 15X faster**
Engineered for superior performance, the HERCULES™ Bi-Metal Hole Saw has M42 cobalt teeth for cutting up to 15X faster** in a wide range of materials including wood, plastic, steel, stainless steel, aluminum, brass. The hole saws have slotted sides for easy plug removal. The durable enamel finish won't rust or corrode.