If you have a front mount this is a very nice addition. You do have to drill two small non-invasive holes in the rear handle.
If you plan on Just using this bracket for your only sound, Do not expect to hear it while riding.
If you are using this while riding you are going to want to pair it up with the no cut no drill Front speaker bracket.
I suggest the Ue megaboom for this set up , you can use a Jbl Extreme, you will have to Double up the straps..
Rear Speaker Bracket
Stainless steal mounting hardware
Ride Safe, Ride Loud.