Our Concrete Grinding and Polishing Systems
About Our Prep/Master Floor Grinders. Whether you need a compact floor grinder for small spaces or you need a large machine to tackle 10,000 square foot spaces, you can expect a powerful performance from STI. Our Prep/Master floor grinders come in a variety of models, including our Prep/Master Jr. for handheld grinding, walk-behind, and even ride-on models.
