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