About this item3-Stage Manual Knife Sharpener: The sharpener combine the coarse grinding, the fine grinding & polishing. For Brilliant Results every time. Prepare, Sharpen, then Hone. Quickly and effectively keeps your kitchen knives brilliantly sharp and restores blunt knives back to their former sharpness.Ergonomic Design: The Smart Sharp Knife Sharpener features a comfort handle for maximum grip, suitable for both right and left-handed users. Heavy duty non-slip rubber base for ultimate stability & safety - any flat surface in your kitchen will do (no need to find a suitable clean surface, unlike knife sharpeners with suction cup designs).Avalable for Knives: Straight edged steel kitchen knives and wide serrated knives (bread knives), including knives with hardened steel blades. DO NOT USE ON: ceramic knives, scissors or micro serrated knives.Easy to Sharpen: Rough Grinding: Put the blade into the diamond grinding tank vertically and push back slightly for around 5 times; Fine Grinding: Put the blade into the tungsten steel tanks vertically and push back slightly for around 3 times; Polishing: Put the blade into the ceramic tank vertically and push back slightly for around 3 times. Please be noted that do not push and pull repeatedly during sharpening.3 Seconds SahrpingSuper simply operation! Put your knife in the sharpening slot, then sharpen in one direction and repeat 3-5 times. Within 3 seconds, the blade is as sharp as new.