High speed drills are rolled forged and have a 135-degree split point. They are suitable for steel, steel forging, cast iron and other work materials. Also known as -Dottie HS20 High Speed Steel Jobber Length Drill Bit 5/16 x 4 1/2 In-L.H.Dottie Co. 5/ 16 HIGH SPEED DRILL BIT - LH-HS20
