FeaturesRip Guardâ„¢, the strongest tooth form in the industryRip Guardâ„¢ limited lifetime tooth break WarrantyPlug Jackâ„¢, an all access slot design for fast plug removalBi-metal construction with 8% cobalt for increased wear resistance195 rpm aluminum, 85 rpm cast iron, 130 rpm mild steel and 65 rpm stainless steel speed