Bosch HSS-Cobalt Metal Drill Bit Set - 19 Piece

Cobalt drill bits offer superior heat resistance and wear resistance compared to standard HSS bits, making them ideal for drilling hard materials like stainless steel.

You can drill into alloyed and non-alloyed steel, stainless steel, cast iron, cast steel, and acid- and heat-resistant steels.

The split-point tip provides active cutting and perfect centering without wandering, making for more precise drilling.

Use cutting fluid, apply appropriate pressure, select the correct speed, and store the bits properly.

Yes, these bits are suitable for use with both drill drivers and drill presses.

These drill bits have a cylindrical shank system, where the shank diameter equals the drill bit diameter.

Reduce drilling speed, apply cutting fluid, and check the material for hardness. Consider replacing the bit if it's worn.

Reduce pressure, ensure the drill is perpendicular to the surface, and check the drill bit's condition. Use the correct drill bit size for the pilot hole.

Use a center punch to create a starting point, and apply steady pressure. Make sure you are using a drill bit with a split point tip.