Cobalt steel tools are similar to high-speed steel, but with more cobalt for improved performance when cutting harder metals such as stainless steel or nickel alloys 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. 4 Flute single end. Manufactured to National Aerospace Standard 907 When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging This cobalt aircraft extension drill bit has a self-centering 135-degree attack angle, and a six-inch length, so it can reach into recesses and cut deeper bores than a traditional drill Drill America - GLBCOX613/64 13/64" X 6" Cobalt Aircraft Extension Cobalt Aircraft Extension Drills - Letter Size - 12" Overall Length. Drill America 13/64 In. X 6 In. Cobalt Aircraft Extension Drill Bit Glbcox613 64 Gold oxide is a thinner oxide surface treatment than black oxide typically used to identify cobalt steel tools; performance is similar to uncoated tools 6 overall length for drilling where extra length for reach is required
