Description: - 1 Set roller saddle tremolo bridge tailpiece for electric guitar replacement - high quality and testing is fine - Special worm involved string device for bridge parts, no need customized double balls string, ordinary single ball strings can be used. - Suit for electric guitar - Material: MetalSpecification: - Color:BlackSize Chart:Size:Approx.80.3 x 83.2mm/3.16 x 3.28inchPackage Includes:1 x guitar bridge1 nut2 mount screws4 mount screws1 X Tremolo bar1 x Specially customized wrench1 x 1.5mm allen wrenches1 x 2.0mm allen wrenches.0mm allen wrenchesNote:Instructions: unscrew the threaded button, when screwed to a certain extent, a hole will appear in the copper color it, insert the guitar strings into the hole.