Silverline Cobalt Drill Bit Set 25pce - 1 - 13mm

Cobalt increases the drill bits' heat resistance and durability, allowing them to cut through tougher materials and last longer.

A split point is a design feature on the drill bit tip that helps the bit start drilling accurately and prevents it from "walking" or wandering across the surface.

These drill bits are designed primarily for metal, including stainless steel, but can also be used on wood and plastic.

The ideal drilling speed depends on the material and bit size. Start with a lower speed and increase if necessary. Using a cutting fluid will help with the process.

A cooling agent (cutting oil or coolant) is a lubricant applied during drilling to reduce friction, dissipate heat, and prolong the life of the drill bit. It also improves the quality of the hole.

Fully ground means that the drill bit has been manufactured by grinding the flutes, which helps for precision and improves the cutting action.

The drill bits have a LIFETIME warranty for hand tools, 3 YEAR for power tools, air & petrol tools.

The drill bits come in increments of 0.5mm.

Check if the drill bit is compatible with the material. Ensure the correct speed and feed rate are being used. Consider replacing the bit if it's excessively worn. Ensure proper cooling agent is applied.

Use a center punch to create a starting point. Ensure you're applying even pressure. Check the split point design of the bit for proper function.

Reduce the drilling speed and apply more consistent pressure. Make sure the cooling agent is adequate. Inspect the drill bit for defects.