Chicago Latrobe 906 High-Speed Steel Aircraft Extension Drill Bit, Black Oxide Finish, Round Shank, 135 Degree Split Point, Wire Size #60 (Pack of 12)
NAS-Type 6" aircraft extension drill. Round shanks allow use with a wide variety of toolholding systems. When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging. Special purpose for working on carbon steel, alloy steel and cast iron.
