Designed for extreme durability and long life. For specialty drilling in hard metals like stainless steel. Parabolic flute form clears chips and debris fast to keep the bit cool. Ideal for drilling on curved surfaces. 135 degree split point tip starts on contact to keep the bit from walking for fast accurate holes. Thick core provides strength and protects against side load breakage. Milwaukee 9/64 In. Cobalt Red. Milwaukee Elec Tool 48-89-2306 9/64" Cobalt Drill Bit.