With the introduction of high-carbon stainless steels,
comes the need for a more aggressive sharpening surface than a conventional
whetstone can provide. The DMT line of sharpeners incorporates a monocrystalline
diamond face embedded in a nickel base for a lifetime of durable, dependable
service. The blue DMT sharpeners are rated at 325 mesh, while the red
is rated at 600 mesh. These
diamond sharpeners are a must for anyone who wishes to sharpen a steel
in the 60+ Rockwell hardness range.