Sharpener

A sharpener is a tool for sharpening. It may refer to:
 * Knife sharpener, a tool for sharpening a knife
 * Sharpening steel, a tool for sharpening a knife, usually a kitchen knife
 * Sharpening stone, a tool for sharpening a bladed or edged tool, such a knife
 * Pencil sharpener, a tool for sharpening a pencil
 * Sharpening jig, a tool for sharpening a woodworking tool