• Thunderbolt® web, provides longer life and faster driller times Parabolic flute clears chips faster 135 deg split point, precision start no walking 3-flat Secure Grip™ shanks reduces bit slippage in the chuck

Milwaukee® Thunderbolt® black oxide jobber length drill bits are designed for extreme durability and long life. 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 deg 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. The three flat secure-grip shank won't slip in the drill chuck. Reduced shank diameter for use in 3/8 in chucks. 29-piece Thunderbolt® black-oxide drill bit set comes with: 1/16 in through 1/2 in by 64ths.