The Dynabrade 18180 Autobrade Sander 5 Locking Type is a fantastic addition to our Industrial and Scientific tool set. Using this product, our team found that it provided a seamless and smooth sanding experience even on rough or uneven surfaces .The auto-locking function is also incredibly convenient, allowing us to easily switch between abrasive discs without the need for additional tools. While the product is a bit on the pricey side, the added convenience and performance make it well worth the investment..