Both QC and 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.
The small simple and discreet QC is designed to house the spike of a HiFi rack or speakers. Stainless steel machined it can locate heavy weight while protecting the floor and improving sound.
For details: https://quadraspire.co.uk/floor-protectors.html