Made in USA: quality stones at competitive prices for most general purpose applications
Crystolon is premium silicon carbide for fast stock removal, quick edge shaping with low loading
May be used to quickly resharpen a cutting edge, but the resulting edge will not be long lasting
When more than one grit size is necessary to resharpen a cutting edge, a craftsman will often use a combination stone to lessen both the expense and the inconvenience of using two single grit stones