A razor is a tool for removing or shaping facial hair, as well as other body hair. Razors come in many shapes and sizes: electric or manual; simple or complex; adorned with a single blade or, in the case of the Gillette Fusion, five blades on the front plus a single-edge trimmer on the back. Manual razors are either refillable or disposable. Refillable razors have a more permanent handle and have higher-quality and longer-lasting blades. Disposable blades are designed to be thrown away and replaced after a few uses.