Features and Benefits:�Rip Guard™, the strongest tooth form in the industry�Rip Guard™ limited lifetime tooth break warranty�Plug Jack™, an all access slot design for fast plug removal�Bi-metal construction with 8% cobalt for increased wear resistance�Works with the following arbors: 49-56-7240, 49-56-7250, 49-56-9100, 49-56-7055, 49-56-7040, 49-56-7140 & 49-56-7150The Milwaukee hole dozer™ Bi-Metal Hole Saw delivers industry leading durability, life and performance