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The Beseler SH71-4B is a dual drum sander designed for sanding large and small stones, wood, plastics, and other materials. The sander is capable of sanding flat surfaces or creating 3D shapes. It features two independent drum assemblies that rotate in opposite directions in order to prevent clogging. The sander also has adjustable tension control and a powerful direct drive motor with an adjustable speed range of up to 3,400 RPM. Additionally, the SH71-4B comes with onboard dust collection, a built-in sandpaper feeder, and a dust-free sanding system.