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 cutting70 rpm stainless steel, 95 rpm cast iron, 140 rpm mild steel, 220 rpm aluminum