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The 29-Piece Milwaukee® Thunderbolt® Titanium coated Drill Bit Set offers convenience and heavy-duty performance on the jobsite. Milwaukee® Thunderbolt Titanium coated drill bits are designed for extreme durability and up to 3X longer life. The Thunderbolt web features a thicker core than a standard drill bit to provide ultimate strength and protect against side-load breakage. The titanium coating reduces heat build-up and keeps the bit sharp to extend performance. A specially designed parabolic flute form clears chips and debris fast to keep the bit cool. The 135 deg split point tip delivers a precision start and prevents walking for fast, accurate holes.