Tupperware knife sharpener. ◾◾This is a sharpener exclusively for single-edged Tupperware knives. Please note that it cannot be used for double-edged knives.◾◾ * Not suitable for double-edged knives such as Santoku knives and small knives, as the blade angle is different. * Not suitable for serrated knives (e.g., frozen food knives, cheese knives) * Not suitable for scissors, razors, or other knives Unused item. Includes instruction manual, but no box. The item is in good condition.