Brushless Pure Copper Motor: Prepare to witness powerful performance. The 1.7HP pure copper motor drives the polishing machine at a speed of up to 1720 RPM, delivering strong polishing power and results. Additionally, the grinding disc is sharp, hard, and wear-resistant. Replaceable Blades: The concrete grinder is equipped with replaceable grinding disc blades, the diamond blades efficiently grind 3230~5382 sq.ft, compatible with diamond blades on the market, offering superior wear resistance, long-lasting life, and easy cutting. Complete Accessories: Comes with a full set of accessories for easy assembly and use. Earplugs are also provided to reduce noise damage from construction. Suitable for Corners: Easily handle various construction challenges with this small grinding disc designed for small-scale construction and corner work. The lightweight grinding disc with an outer diameter of 10'' / 250 mm allows for precise grinding of indoor and outdoor corners