Using the arranged sets of four coarse wheels and two fine wheels, you only have to draw a knife through the V intersection of the ceramic stones to remove nicks in the blade (on the tan coarse wheels) or to hone it on the fine white wheels.
Better a simple two-stage system at hand than using a dull knife because there is no time to take it to the shop for the full treatment. At just under 8" x 3" and 1-1/4" thick, it stores readily. High-impact plastic frame. Not for use with laminated knives.
Made in USA.