Compact but effective .
Initially I thought it very small ( 28 mm dia. ) .
After securely using the suction feature to fix it to a smooth surface , which incidentally can be at any angle, the sharpener went on to fully sharpen 10 knives in 10 minutes .
The sharpness produced was excellent for general kitchen use , but if I had given more attention to each knife , an extra-sharp & keener edge would have resulted .
The sharpener was so effective that a word of warning should be given , in that very light pressure on drawing the knife back between the sharpening blades will produce better i.e. sharper cutting edges . Too much downward pressure will result in large amounts of good metal being scraped off , and a nasty grinding noise .
The latter procedure could be useful in producing a cutting edge from an absolute blunt tool such as a pointing trowel or chopping axe head ( should such an action be necessary ) .
In conclusion , a very effective ; quick ; low-cost kitchen aid .
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