FeaturesIce Hardened™ cryogenically treated for up to 50% longer lifeOptimized tooth form for up to 2X faster cuttingWide, angled and offset slots for easy plug accessBi-metal construction with 8% cobalt for increased wear resistanceFunctional slots for faster plug removalMatrix II Bi-metal teeth for greater durabilityPositive rake angle for fast cutting245 rpm aluminum 110 rpm cast iron, 165 rpm mild steel, 80 rpm stainless steel