Product Description
Manufactured from M35 cobalt steel, with molybdenum and cobalt added to creates a hardened alloy, extremely heat resistant; for much faster cutting and extra longer life span.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 plastic indexed storage case for easy transport to your worksite.
Particularly successful in cutting through hard metals such as stainless steel and cast iron, although they can be used for softer materials, too. Not for hardened steel / high carbon steel. Try to adjust the RPM when it fails to penetrate.