Made in the USA from High Speed Steel (HSS). These bits are made to drill through hardened stainless steel plate (30+ on the Rockwell "C" scale) so wood & acrylics are not an issue.  These drills are so sharp (point and outer cutting surfaces) that they will easily cut skin if not properly handled.  The flutes have a nitro carburized coating that inhibits heat & material build-up.  They are coated with an amber gold anti-friction surface treatment and are ground with a 135 degree split point tip.  These drills will easily outperform cobalt bits.

This is the best series of drills that I have ever used.  Don't confuse these bits with imported drill bits - that's like comparing a "Chevette" to a "Corvette".  They are not that much more expensive than 'regular' drill bits and with the proper care they should last a very long time before they require sharpening.  These bits are an excellent choice when used to drill Desert Ironwood.

I have received inquiries why we don't recommend 7mm bits for the slimline and other 7mm type kits.  It has been my experience that a 7mm hole is a little too tight for these kits and whatever glue you are using to secure the tube inside the blank can be minimal because the hole size and the brass tube are just about the same size.  I recommend using either the 'J' or a 9/32" bit for the 7mm kits.  We do stock 7mm bits for those who want them.