Using the advanced, efficient Criss-Cross® sharpening technology, the Hybrid® 290 provides a superbly sharp edge with lots of "bite." Its 100% diamond abrasive wheels sharpen simultaneously “into” and “out-of” the edge for a superior burr-free edge. Stages 1 and 2 are electric with Stage 1 dedicated to 15° edge knives and Stage 2 for 20° knives. Stage 3 is used for polishing both types of knives as well as for sharpening serrated knives. Safe for all quality knives, the Hybrid® 290 is easy to use, requires no guesswork and will quickly sharpen even the dullest of knives. It's a stylish addition to any household with its elegant and durable brushed stainless steel cover and sleek design. Engineered and manufactured in the U.S.A.