In 1984 Paul Reed Smith, with the help of John Mann, developed the PRS Tremolo. The PRS Tremolo design is similar to a traditional fulcrum tremolo, it too uses a six-screw pivot. It also has a few differences though. Each of the six screws were notched to accept the knife-edge of the bridge providing six brass knife-edge fulcrums. This knife-edge set-up ensures that the guitar returns to “Zero Position” after use and stays in tune. The individually adjustable saddles are placed within polished side walls to prevent them from moving sideways which also improves tuning stability. The tremolo block is drilled out so the ball ends rest right up under the bridge base plate. This leaves less string behind the bridge saddle so there is less chance of detuning, via proper string stretching. Other features are
Paired with locking tuners, the system has a great reputation for tuning stability. In 1984 Paul Reed Smith was granted a patent on this tremolo system.