Milwaukee ice hardened products utilize a proprietarycryogenic hardening process that improves upon traditional heat treatprocesses. Unlike surface coatings that wear away cryogenics Harden to thecore by minimizing soft metal (austenite) and creating more hard metal(martensite). the result is a product that is more consistently hardthroughout resulting in life up to 50% longer than the competition. From theManufacturer Milwaukee Electric Tool Corporation introduces Ice Hardened holesaws a new generation of hole saws that offer up to 50% longer life than thecompetition and are ideal for metal and wood cutting in a wide variety ofHVAC electrical plumbing and maintenance/repair applications. Milwaukee IceHardened products utilize a proprietary cryogenic hardening process thatimproves upon traditional heat treat processes. Unlike surface coatings thatwear away cryogenics harden to the core by minimizing soft metal (austenite)and creating more hard metal (martensite). The result is a product that ismore con