Drillco 2050 Series High-Speed Steel Combined Tap and Drill Bit, Uncoated (Bright) Finish, Round Shank with Square End, 1/4"-28 UNF High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance Uncoated tools feature just the base substrate without any additional treatment or coatings and are suitable for a wide range of applications Comes with round with square end shank When run in a counterclockwise direction (right-hand cut) spiral Fluted tools evacuate chips up and out of the cut to reduce clogging Right-hand cut tools have a cutting action that engages when they are run in a Clockwise direction