Here is some helpful information regarding pad life of a 30 grit! Concrete DNA Diamond Satellite Pads Makes polishing concrete super easy and FAST! Run pads on a machine from the local rental store! Use on a low speed buffer (around 175 rpm). Many use our 30 grit for prepping a floor for stain and seals or before applying a coating. These are a great way to prep your concrete flor sealers or thin mil epoxy coatings like diy Rustoleum. Diamonds on throughout the entire pad (satellites on one side) https://concretefloorsupply.com/shop/diamond-pads-with-resins/