Features Rip Guard - each tooth is built with more steel behind the cutting edge for added strength. Includes Plug Jack, an all access slot design for fast plug removal. The Plug Jack gives access lower into the cup for thick material and higher towards the teeth for thin material increasing productivity and eliminating down time between holes. Bi-metal construction with 8% cobalt for increased wear resistance. For use with steel, non-ferrous metals, wood, plastic. Kit includes 1 In. Hole Dozer Bi-Metal Hole Saw, 2-1/8 In. Hole Dozer Bi-Metal Hole Saw, Hole Saw Arbor Adapter, 3/8 In. Small Thread Arbor.