Number Of Hole Sizes: 2Shank: 3/8"Patented Two Flute Design Cuts Fast, Clean, Accurate And Burr-Free Round Holes135° Split Point Design For Faster On Contact Penetration And Less WalkingGood For Material Up To 1/8"Works On Plastic, Wood And Most Metals Including Steel, Brass, Aluminum, Copper And Stainless SteelSizes: 7/8", 1-1/8" (For 1/2" And 3/4" Conduit)