I have a Hofner Shorty Bass, which I soon noticed was neck heavy. One day the neck tilted down, the strap popped off and the headstock hit the floor chipping one of the tuner pegs. After some research, finding that the factory tuners were guitar tuners I eventually discovered these, and were a PERFECT fit. Effectively the same as the tuners supplied on the bass itself but with all metal construction. I noticed these hold tuning better than the originals too. Very nice and easy way to upgrade the Shorty Bass. The only downside (if you can call it that) is I now have two "spare" tuners.