Number Of Hole Sizes: 5Shank: 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", 1-7/32", 1-1/4", 1-3/8"