Has anyone tried Congress' stones?

[Turbo Tension]

I just ordered varying sets of 'ruby' and 'moldmaster' stones. I'm going to play with them in my Sharpmaker. I was wondering if anyone had any experience. Both of these series's were described as being effective on hardened steel and tool steel.

 

[thombrogan]

Maybe. The folks who used the 1/2" triangles seemed happy with them as a faster-cutting/lower-costing alternative to Spyderco's diamond Sharpmaker hones at the time.