High speed steel with M-35, five percent cobalt, for higher heat and abrasion resistance; heavy-duty web construction for strength and durability. Split point begins drilling immediately, minimizing bit walk when used in applications such as metal drilling, including heavy-duty abrasive alloy metal drilling on hardened steel (heat-treated).
M-35, five per cent cobalt, and extra thick drill core for optimum life and durability in hardened steel, super alloys, titanium and stainless steel applications; split point minimizes bit walk. All sizes 3/16" and larger have three flats on the shank for a better grip on chuck.
Made of industrial strength cobalt for optimum life and durability with maximum speed in stainless steel and other hard metals. Tip starts on contact and eliminates bit walking.
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 to provide ultimate strength and protect against side-load breakage. A specially designed parabolic flute form clears chips and debris fast to keep the bit cool. The 135? split point tip delivers a precision start and prevents walking for fast, accurate holes. Effective for drilling on curved surfaces, Milwaukee Thunderbolt Cobalt bits require less effort to drill through stainless steel, high alloy steel and cast iron. Highly recommended for use with portable drills.