Milwaukee M4 2101-21 (2101-21)

Our Carbide Hammer Drill Bits are designed with sharpened carbide to deliver up to 9x life in concrete and up to 4x faster drilling into masonry material. Engineered with a precision ground tip, these more→bits deliver faster starts and less walking when drilling into concrete, brick and block. The carbide-tipped masonry drill bits wide flute design removes dust faster, reducing heat and delivering more holes per charge.

Milwaukee Thunderbolt black oxide drill bits are designed for extreme durability and long life. The Thunderbolt web features a thicker core than a standard drill bit to provide ultimate strength and p more→rotect against side load breakage. A specially designed parabolic flute form clears chips fast, while the 3-flat Secure-Grip shank holds the bit firmly in the drill chuck. Effective for drilling on curved surfaces, Milwaukee Thunderbolt black oxide bits require less effort to drill through metal, wood and PVC, and are highly recommended for use with portable drills. The set comes in a resilient case.

Diablo's new step drill bits bring exclusive technology to the electrician, plumber and HVAC contractor with fast, accurate cuts and increased stability in thin metals, PVC other plastic materials. Th more→e innovative Split Point Tip design enables a fast, on-point start resulting in increased durability and up to 6X longer life. An automated precision grinding process on each step reduces wear and delivers 2X faster cuts. Multiple hole sizes are made easy with laser etched step markings while increased step heights for common hole sizes makes drilling holes more efficient and faster. Designed with a 1/4 inch hex shank, these bits are impact ready and can be used with drills and impact drivers.