In 1901, the American inventor King Camp Gillette, with the assistance of William Nickerson, submitted a patent of a new variation of safety razor with disposable blades which was patented in 1904. One reason was that shaving with a safety razor should be safer and more convenient than shaving with a classic straight razor with a sharp blade. The thick grip of these safety razors can be reused. Gillette realized that a profit could be made by selling an inexpensive razor with disposable blades. This has been called the razor and blades business model, and has become a very common practice for a wide variety of products.