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 cutting285 rpm mild steel, 145 rpm stainless steel, 190 rpm cast iron, 425 rpm aluminum