Disston 288164 Master Mechanic 27/64 Inch By 5 3/8 Inch Cobalt Drill Bit

27/64 inch x 5-3/8 inch, high speed steel with cobalt drill bit, 135 split point, jobber length, 3/8 inch shank, 135 split point design with 4 cutting edges allows quick penetration & eliminates walking, 8 percent cobalt content provides heat resistance & delivers maximum cutting efficiency at temperatures in excess of 1000 degree fahrenheit, recommended for drilling in hard metals such as heat treated steel, stainless steel, chrome, manganese steel plus titanium & armor plate, carded.