Ergo Chef ER43 Pro-Series Diamond Oval Knife Sharpener, 12-Inch

This sharpener is outstanding, with the exception of the non-slip tip. the quality of the edge it produces is excellent. The tip, however, seems very cheap, is not well attached, and really isn't all that "nonslip. I usually dont hold it against a surface, but if you do, just be careful, and maybe put the tip on a damp rag to further avoid slippage.