HSS Blacksmith Drill Bit - All Metric Sizes 13.5mm - 26mm. Reduced Shank Drills
Reduced Shank Drills. Steam tempered blue finish. Standard helix +118 degree point. 1/2" reduced shank allows cutting of larger holes using a standard 1/2" or 13mm, 3-jaw chuck. Durable, mainly used for bore machining.