Pair of UniversalSharpener.com, 6" 400 Grit Diamond Table Saw Blade & Router Sharpening Disks / Wheels.

Includes two different models: The standard thickness model US55020, and the thinner model US55022.

These wheels are both NEW in open box.

The price of these wheels + adapter new is $201.85 including shipping from Universal Sharpener.

I purchased these to sharpen table saw blades and router bits using a home-made jig for my table saw.  I don't have time, so my loss is your gain.  Search YouTube for videos about sharpening your own blades with a DIY jig.

These disks are commonly used on the US-550 PRO Sharpening System made by Universal Sharpener.

The set includes an adapter ring needed to mount these wheels on a standard table saw arbor.
 

This  wheel is used for face grinding  carbide  tipped saw blades,  router bits  and shaper
cutters.  It  is a 400  grit, 100 concentration wheel recommend for finish  sharpening  that
requires a fine finish.  It  measures  6” in diameter with an arbor dimension  of 1-1/4” and
the max RPM is 6000. This wheel comes standard with the US-550 Universal sharpener.

Many years on eBay, 100% feedback rating.  Buy with confidence.