Diamond coated hones for sharpening all kinds of blades. 50mm x 19mm area of superfine grit diamonds on thin steel plate on slim plastic handle.
Ideal for HSS turning tools of all kinds. Just try bringing up a superior burr on a woodturning HSS scraper. Works on tungsten carbide as well. Can be used wet or dry. Wet is best - just dip in water but do not leave in water
Also sharpens knives, drillbits, scissors, fishhooks and most anything with a sharp edge.