Champion twist drills are industrial quality cuttingtools, not to be confused with common drill bits.Manufactured to exacting standards to produce thelowest cost per hole, we provide a variety of drills formaterials ranging from wood to exotic alloys. General Purpose Black Oxide, Straight Shank, 118 ° Point, HSS Diameter - 5/16"Flute - 3 3/16"Overall - 4 1/2" |