Description: 1 Piece tremsetter bridge tremolo stabilizer. Easy to install,the Tremsetter installs on your tremolo guitar in the back cavity where the springs are. It can return your full-floating tremolo to its exact "zero" neutral position, eliminating flutter and sag. Keep sound stable. Suitable for electric guitar replacement parts. Material: Brass Size Chart: Approx. 58 x 10 x 11mm / 2.28 x 0.39 x 0.43inch Package Includes: 1 Set Tremsetter