The Dongcheng DSM03‑100A is a handy 4″ (100 mm) / 16 mm arbor corded electric angle grinder powered by a 710 W motor. It spins at a no‑load speed of 13,000 rpm, making it ideal for light to medium‑duty tasks such as cutting, grinding, deburring, weld‑prep, polishing, and surface cleaning. Despite its power, it weighs just ≈ 1.6 kg, offering excellent maneuverability for overhead or angled operation. Its 16 mm mandrel and 100 mm disc size are a compact combo frequently used in metalworking and DIY jobs. Manufactured with pure‑copper motor windings and durable high‑quality gearing, it’s engineered to resist heat and offer long life. The dust‑proof labyrinth structure helps protect internal gears and bearings for more reliable performance. Built‑in double insulation safeguards reduce the risk of electric shock, while the slide‑type power switch—located for one‑hand operation with lock‑on support—adds user convenience. Key user‑friendly features also include a spindle‑lock button for tool‑free disc changes, side handle (left or right mountable) for better grip, spare carbon brushes, and an accessory wrench. Finished in Dongcheng’s signature blue trim, the DSM03‑100A is a versatile, dependable compact grinder that punches above its class for both home and trade applications