Key features

• •Manufactured from M35 cobalt steel, with molybdenum and cobalt added to creates a hardened alloy, measuring Rockwell hardness up to 67, for much faster cutting and extra longer life span, with up to twelve times when compared with an average HSS drill bit.
• •No center punch is needed-the aggressive 135° quick-cut points are self-centering and penetrate quickly with less pressure. Will not "walk" or "wander".
• •Straight shank allows for firmly holding and accurate centering, fit for standard drill chucks and regular round collet chucks
• •The set includes 13pcs of M35 cobalt steel twist drill bits: 1.5mm, 2mm, 2.5mm, 3mm, 3.2mm, 3.5mm, 4mm, 4.5mm, 4.8mm, 5mm, 5.5mm, 6mm, 6.5mm. Well organized in a metal indexed storage case for easy transport to your worksite.
• •Extremely heat resistant. These cobalt drill bits retain their hardness up to 1000 degrees, making them ideal for drilling cast iron, stainless steel and other hard materials.