Crystallume has introduced a new diamond coated tool.  They call it the Lightning Series.  Here is what they have to say about it:

“The Lightning Series has about half the thickness of our standard diamond coating.  The reduced coating thickness gives up tool life for edge sharpness and lower cost, due to reduced time in the coating chamber.

The Lightning Series is available in common standard fractional sizes, in both square, corner radius and ball ends.”

You can find more information in there catalog located here:

Crystallume Lighning Series End Mills