Fender Mustang Dynamic Tremolo Fender Mustang Dynamic Tremolo This is a tremolo unit for Mustangs, once sold by Sound Loft, a well-known parts supplier. It is a Fender Japan tremolo unit with the following Sound Loft parts pre-installed: - Black Shoes (reinforced springs) - Arm Screw (screw to prevent the arm from falling out) - Tremolo arm (with groove) is also included. It was sold as a set, so a sticker is attached to the back. Please note that the screws to fix the bridge to the guitar body are not included. Everything in the photos is what's included. It has been used, so there are scratches, dirt, and signs of use overall. Please understand this before purchasing.