49-56-0223 Milwaukee Tools 4-1/4" Hole Dozer Bi-Metal Hole Saw The Milwaukee bi-metal hole saw offering has been upgraded to a new product, Hole Dozer™. As of December 1, 2014 all Milwaukee bi-metal hole saws are now shipping as this upgraded product. During this transition period, please visit Milwaukee Tool for the most up to date images and information. Online retailers sites are not all currently up to date.Rip Guard, the strongest tooth form in the industryRip Guard Limited Lifetime Tooth Break WarrantyPlug Jack, an all access slot design for fast plug removalBi-metal construction with 8% cobalt for increased wear resistance