One of the best sharpeners we’ve tested! And an incredible value as well. The unique ‘locking’ mechanism on the side of this sharpener actually grips and ‘locks’ the suction base onto any smooth work surface. This means quick, effective, stable and very safe sharpening. Once secured in place, simply draw any knife, serrated or straight edged; even expensive hardened blades, from hilt to front and the multiple internal sharpening wheels create a pristine sharp edge. Simple! Absolutely no skill required. Slicing and dicing will be effortless once again, and your knife sharpener can be conveniently stored away until next time.