A razor is a bladed tool primarily used in the removal of unwanted body hair through the act of shaving. Kinds of razors include straight razors, disposable razor, and electric razors.While the razor has been in existence since before the Bronze Age (the oldest razor like-object has been dated to 18,000 B.C.), its modern counterpart was invented in the 18th century, and the 1930s saw the invention of electric razors.