Abstract: A self-contained tremolo for a guitar or other stringed instrument provides exceptional ease of setup and operation. The tremolo has a base plate fastened to the guitar over a small cavity. A bridge is pivotally connected to the base plate by means of bridge pins that enter blind slots in the base plate. String tension is counteracted by a spring mechanism that includes studs received in the bridge and passing through holes in the base plate and entering the guitar cavity. Compression springs act between the studs and the base plate. Identical intonation blocks are held on steps in the bridge such that the contact points between the intonation blocks and the strings lie along a curved line that matches the curve of the guitar frets. Fine tuners have plugs with V-grooves that contact the strings. The plugs are held in threaded shanks, but they do not rotate with the shanks during fine tuner adjustment, thereby eliminating the tendency of the strings to twist or slip off the ends of the fine tuners.