For polishing and grinding metals, resins, etc. using dry or wet methods. POWER: 500 W, 2-speed, maintenance-free motors QUIET: noise level 48 dB, vibration-free. LEAK-TIGHT: sealed shafts to prevent water and pumice from getting in. SAFE: Safety switch to prevent accidental start-up after power failures, thus removing any risk of injury. ERGONOMIC: Built to allow free arm movement and comfortable work in standing or sitting position. Lever type extractors for simpler brush-holder removal. Robust, heavy construction (12 kg.) and wide base on non-slip rubber feet for maximum stability and steadyness.