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 1/2 In. Cobalt Red.
Milwaukee Thunderbolt Cobalt drill bits are designed for extreme durability and long life in specialty applications. The Thunderbolt web features a thicker core than a standard drill bit, which provides ultimate strength and protects against side-load breakage. A specially designed parabolic flute form clears chips and debris fast to keep the bit cool. A precision start, 135 Split Point tip starts on contact to keep the bit from walking for fast accurate holes. Excellent for drilling on curved surfaces, requires less effort to drill and is highly recommended for use with portable drills.