Black&Decker REVSD4C

"IRWIN 12"" Aircraft Extension High Speed Steel Fractional Straight Shank Drill Bits are ideal for drilling in hard-to-reach areas and for running wires and cable"

Diablo's SDS-Plus 2-cutter carbide-tipped hammer drill bits provide one of the fastest and longest lasting drilling solutions on the market for concrete. Optimized with a unique brazing and hardening more→process, the carbide tips extends life and productivity, allowing users to drill fast, accurate holes. Optimized for maximum performance in corded and cordless SDS Plus rotary hammers.

Milwaukee Thunderbolt pilot bits are designed for extreme durability and long life. The Thunderbolt web features a thicker core than a standard pilot bit, which provides ultimate strength and protects more→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.