✅【5% COBALT TWIST DRILL BITS SET】Made from M35 Cobalt Steel with Molybdenum and Cobalt added to form a hardened alloy, can measure up to 67 Rockwell hardness, cut faster, last longer, and last longer than normal HSS drill bits 12 times.

✅【FULL GRINDING PROCESS AND 135° SPLIT POINT】Precise 135° SPLIT Point, gold oxide surface and hex straight shank. Prevents walking and removes chips and particles faster. Precision fully ground to ensure smooth chip movement.

✅【PROFESSIONAL AND WIDELY USED】M35 Cobalt High Speed Steel is more suitable for hardening materials. Ideal for cutting stainless steel, steel and cast iron as well as wood, aluminum alloys and other metals. Not suitable for glass or ceramic materials. Pay attention to speed, pressure and heat control when drilling.

✅【SERVICE】If you have any problem with our metric drill bit set or are not satisfied with the product, please feel free to contact us.

✅Specification

Material: Stainless Steel, Cobalt Steel, Cobalt
Shank Type: Straight
Split Point: 135 Degrees
Measurement System: Metric

✅13PCS: 1.5, 2.0, 2.5, 3.0, 3.2, 3.5, 4.0, 4.5, 4.8, 5.0, 5.5, 6.0, 6.5 mm

✅Note:

Cobalt drill bits require slow RPM when drilling metals. The suggested RPM is only for your reference. It may vary from different materials. You can start from a lower RPM and adjust it higher slowly. Once the bit can get into the workpiece. the adjustment should be stopped.