Hymnorq 40PC M35 Cobalt Steel Twist Jobber Small Drill Bits, 4 Mini Sizes 3/64 Inch 1/16 Inch 5/64 Inch and 3/32 Inch, Extremely Heat Resistant, for Stainless Steel Cast Iron Aluminum

COBALT STEEL - Manufactured from M35 cobalt steel, with molybdenum and cobalt added to create a hardened heat-resistant alloy, measuring Rockwell hardness up to 67, for much faster cutting and extra longer life span, with up to twelve times compared with an average HSS drill bit. NO CENTER PUNCH NEEDED - The 135° Quick-Cut pilot split points are self-centering and can penetrate quickly with less pressure. The bits will not "walk" or "wander". Straight shank allows for firmly holding and accurate centering, fit for standard drill chucks and regular round collet chucks(recommended). 40PC FRACTIONAL INCH BITS - The set includes 40pcs of M35 cobalt steel twist drill bits, 3/64" x 10pcs, 1/16" x 10pcs, 5/64" x 10pcs, and 3/32" x 10pcs. DIN 338 standard and jobber length. FOR METALWORKING - Particularly successful in cutting through hard metals such as stainless steel and cast iron, although they can be used for softer materials, too. International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.