Milwaukee 49-22-4095 10-pc Electricians Hole Dozer Hole Saw Kit Rip Guard, the strongest tooth form in the industry Plug Jack, an all access slot design for fast plug removal Bi-metal construction with 8% cobalt for increased wear resistance ICE HARDENED for up to 50% longer life than the competition Matrix II Bi-Metal Teeth for greater durability Positive Rake Angle for fast cutting Radiused Tooth Back reduces stress on teeth Deeper Gullets for fast chip removal and Funtional Slot Geometry provides easy plug removal