A safety razor is a shaving implement with a protective device positioned between the edge of the blade and the skin. The initial purpose of these protective devices was to reduce the level of skill needed for injury-free shaving, thereby reducing the reliance on professional barbers.
Double-edge safety razor and blade
Image: Quattro Titanium Energy
A straight razor that uses exchangeable blades (shavette) with a protective guard
A modern double-edge safety razor blade
A razor is a bladed tool primarily used in the removal of body hair through the act of shaving. Kinds of razors include straight razors, safety razors, disposable razors, and electric razors.
A modern razor that uses replaceable blade cartridges
Image: Philips Norelco 9700 Rotary Electric Shaver (30973817280)
Bronze razor
Razor (top) and nail cutter with bone handle (bottom) found in a grave of the Hallstatt culture.