2825 25-Piece Straight Shank Cobalt Twist Drill Set Product Description ●25-Piece Straight Shank Cobalt Twist Drill Set (1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10.0, 10.5, 11.0, 11.5, 12.0, 12.5, 13.0MM) ●Made of M35 high-speed steel with a 5% cobalt content ●Drills are ground to shape for precise dimensions ●135° double relief angle provides self-centering, preventing slippage during drilling ●Uses dense thread technology to effectively increase cutting speed and service life.
