![]() ![]() ALSO CONSIDER: Milwaukee 15-Piece Cobalt Red Helix Drill Bit Kit.MOST PRECISE: Milwaukee 3-Piece Cobalt Step Drill Bit Set.BEST FOR HOBBYISTS: Bosch CO14B 14-Piece Cobalt M42 Drill Bit Set.BEST METRIC: Stroton Metric M42 8% Cobalt Twist Drill Bits Set.UPGRADE PICK: Drill America 29-Piece Cobalt Jobber Drill Bit Set.BEST BANG FOR THE BUCK: Comoware Cobalt 15-Piece Twist Drill Bit Set. ![]() RUNNER-UP: DeWalt Industrial Cobalt Alloy Steel Set.BEST OVERALL: Irwin 29-Piece Cobalt Alloy Steel M-35 Drill Bit Set.Read on to find out what makes a durable and effective drill bit for stainless steel, our selection criteria, and how our selections performed in testing. We spent more than 40 hours researching the best materials and designs used to make these bits, selecting our top picks, and then testing our picks in the workshop. With loads of available bits for hard metal applications, finding the right drill bits for stainless steel can be challenging. Luckily, manufacturers design special drill bits capable of puncturing even the hardest grade of stainless steel. Drill bits built to work on softer material, like wood, won’t do the trick against stainless steel. Whether you’re expanding the size of a junction box punch-out or boring out a broken bolt, having the right drill bit matters. DIYers and trade professionals often need to drill stainless steel to complete a variety of electrical, plumbing, and automotive projects. Available in several grades, each with at least 10.5 percent chromium, stainless steel is popular because of its low maintenance, high sheen, and resistance to stains and rust. ![]()
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