Milwaukee Thunderbolt Black compound wholesaler length drill bits are designed for extreme sturdiness and long life. The Thunderbolt internet options a thicker core than a regular bit to produce final strength and defend against side-load breakage. A specially designed parabolic flute kind clears chips and detritus quick to stay the bit cool. The a hundred thirty five degree split purpose tip delivers a exactness begin and prevents walking for quick, correct holes. Effective for drilling on curved surfaces, urban center Thunderbolt Black compound bits need less effort to drill through metal, wood and PVC, and are extremely counseled to be used with transportable drills. Sizes 1/8″ and smaller have a pair of bits per card. 9/64″ and bigger are one bit per card.