This item is a bridge tailpiece which is die-cast finish to suit flat body guitars fitted with a type bridge. These units have the roller retaining bar to give you the angle over that is needed. The arm of the is spring unloaded and attached to a pivoting metal bar, around which the strings of the guitar are fitted. This is highly controllable within range of motion and requires little force to operate. The vintage makes your guitar look great. This is a tremolo for manually creating a TRUE vibrato. These units have the roller retaining bar to give you the angle over that is needed. Colour:silver :Metal Package Contents: 1 x Tremolo Bridge Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.