Key benefits Powerful all copper motor with torque for strong performance and low noise, capable of 4000 to 9000 rpm to handle metal, jewelry, plastic resin, knives and more Double bearing design delivers speed, torque, smooth operation, and reduced vibration; CNC precision machining keeps the unit steady and unmoving during work Plus Kit lets you convert the belt sander into a mini bench grinder by mounting a grinding wheel on one side and a buffing wheel on the other Speed is easily controlled with a slider on the power adapter, providing 7 gears from the lowest to the speed for precise adjustment Product features Material and build: all copper motor for reliable power and longevity Operation stability: double bearings with antiskid design and precision machining to ensure smooth, stable performance Conversion capability: by installing grinding and buffing wheels on the left and right sides of the belt sander, a mini bench grinder with sanding belts can be set up Speed control: 7 gear options via the power adapter slider for convenient speed adjustment Use scenarios Metal finishing and sharpening: deburr, shape, and finish metal parts, blades, and tools with controlled speed and torque Jewelry making and polishing: perform precise shaping and quality polishing on jewelry pieces with the buffing wheel Plastic resin and hobby projects: sand, smooth, and refine plastic resin crafts and other small workpieces with adaptable speed settings Compatibility and performance highlights All copper motor design delivers strong torque with quiet operation Double bearing construction provides stability during speed use The included plus kit enables setup of a mini bench grinder by adding a grinding wheel and a buffing wheel to the belt sander 7speed slider control allows fine tuning for different materials and finishing needs