Improvements in an interchangeable shaver that accepts a variety of different disposable razors. To retain a disposable razor with a handle the interchangeable shaver has a cavity where the handle of the disposable razor slides into the holder to grip the handle and prevents the disposable razor from rotating as the shaver is drawn up, down and along the back, legs or other area of a person. The adapter angles the disposable razor to provide an optimal shaving angle for maximum hair removal and the closest shave to reduce the frequency of repeat shaving. A further improvement is an adapter that connects the interchangeable shaver to a disposable head. The adapter is configured to accommodate different disposable heads with a single adapter. The shaver has an extendable handle configured to prevent the razor from rotating on the shaft.