There are enough factors working against you when you're polishing edges on a concrete floor. Do yourself a favor and don't work against yourself even more by using the wrong equipment and subpar diamond abrasive pads. You could find a wide range of diamond tooling from MEtool Diamond Tools. Handheld, on-your-knees equipment 7- to 9-inch high-speed grinders with a shroud and metal cup wheel abrasive are generally used for the first cut or coating removals. 7-inch variable-speed grinders are often seen in a non-shrouded application with resin diamond pads and generally used in conjunction with the grinding steps of the floor machine. Stand up and get off your knees equipment A handheld 7- to 9-inch high-speed grinder attached to a carriage, again typically equipped with a shroud and metal cup wheel abrasive and used for the first cut or coatings removal. A 2- to 3-hp stand up edger with single rotary head and articulating body for forward edge grinding. Counter rotary head stand up grinder.