These are heavy duty speaker brackets, unfortunately they required some modification to work with my speaker selection in my 2021 mustang gt. I attempted to use these with DS18 3" speakers. The outer lip on these mounts limit speaker diameter size to 88.9mm. The DS18 speakers had a diameter of 89mm and did not fit. I ended up grinding the top of this mount flat so it would realistically accommodate speakers with a greater diameter. I also ended up grinding out some material inside the bracket to accommodate speaker terminals. Overall it worked, but I had to work for it. I think for the price of these, the company can do better.