These are high quality aerospace drill jobbers made in the U.S.A.
The drill bits are carbide hard diamond coated and brad point shaped to penetrate the toughest carbon fiber and kevlar fiber laminates. The flute shape enables an easy extraction of the drilling material up and out of the hole, reducing burring. This makes very clean holes even in softer glass fiber laminates. They stay centered without a hole point.
Set of 6 metric size drills from 1 to 6 mm.
Also available on request in single metric size, letter, fractional or wire gauge sizes.
The wood block shown on the pictures is not included.
Here is a video of the jobber in action:
<iframe src="http://player.vimeo.com/video/69225740" width="500" height="281" frameborder="0" webkitAllowFullScreen mozallowfullscreen allowFullScreen></iframe> <p><a href="http://vimeo.com/69225740">Hole cutting in 3 mm carbon laminate with a hand drill.</a> from <a href="http://vimeo.com/user3168634">Oli Ni</a> on <a href="http://vimeo.com">Vimeo</a>.</p>
You'll find a complete technical description on cutting precise holes in laminates and drilling recommendations here: