FeaturesIce Hardenedâ„¢ 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 cutting135 rpm aluminum 60 rpm cast iron, 90 rpm mild steel, 45 rpm stainless steel