OEM Tools 1/16" M-35 Cobalt Jobber length drill bits are designed for jobsite durability and extended life. Our web geometry has a thicker core than a standard drill bit, providing the user with maximum strength; helping eliminate side-load breakage. We added a unique parabolic flute that keeps the bit running cool. Excellent for drilling on curved surfaces, requires less effort to drill and is highly recommended for use with portable drills. The Tri-Cut shank won't slip in the drill chuck. Bits above 3/8" diameter have a reduced shank diameter for use in 3/8" chucks. Applications include a variety of metals and synthetic materials. Performs best in steel, stainless steel, cast iron, titanium, nickel, and copper materials