Here's what Duesenberg say about the Les Trem II
Did you ever want to simply swap the tailpiece on your guitar for a tremolo without any modification? Meet the Duesenberg Les Trem.
The Duesenberg Les Trem is a compact and simple to install tremolo system for guitars featuring a tune-o-matic bridge and stop-tailpiece.
It can be mounted on the bushings of a standard stop-tailpiece and does not require any modification to the body of the guitar. If you want to, you can remove it and install the stop-tailpiece back again in seconds.
Ships including metric and US mounting screws.
Required spacing of stop-tailpiece studs: 81.5mm/3.2" (Standard measure for most stop-tailpieces)