Drill bits in the set:

Application:

The drill bits are made from Titanium nitride coated HSS (hi-speed steel). The drill bits are fully precision ground at 135° with a split point. The drill bits can also be used to drill either wood or metal.

Sharpening:

The drill bits are re-sharpenable several times. We recommend the following machines as it will sharpen 135° HSS  split point drill bits with ease:

• Drill Doctor® 500X - Diameter range of 2.4mm - 13mm (19mm accessory available)
• Drill Doctor® 750X - Diameter range of 2.4mm - 19mm
• DAREX® V390 - Diameter range of 3-19mm

TIP:
When drilling hard metals, always use a coolant/lubricant. We recommend using CT-90.