FeaturesMade from a cryogenic hardening process rather than heat to create a more durable and longer lasting hole sawOptimized tooth form for cutting twice as fastWide, angled and offset slots for easy plug accessRip Guardâ„¢ the strongest tooth form in the industryRip Guardâ„¢ limited lifetime tooth break warranty plug Jackâ„¢ an all access slot design for fast plug removalBi-metal construction with 8% cobalt for increased wear resistanceIce Hardenedâ„¢ cryogenically treated for up to 50 PCT longer lifeOptimized tooth form for up to 2X faster cuttingRoom for additional hole saw and arbor storageStorage space for one (1) 12 in extension or (2) 6 in extensions