QX7 floor protectors are machined from solid Stainless Steel. Not only do they protect your floor from the spikes on your rack or speakers but they enhance the sound performance of your system. QX7 sound enhancer and heavy duty floor protector. The larger QX7 is designed to house heavier weight performance racks and speakers. A stainless steel machined floor protector designed in the shape of our racks to improve sound performance.