Disston 288035 Master Mechanic 23/64 Inch By 4-7/8 Inch Cobalt Drill Bit

23/64 inch x 4-7/8 inch, high speed steel with cobalt drill bit, 135 split point, jobber length, straight 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.