3-in-1 Multifunctional Combo: Combines a 13' x 1.2' sanding belt, 2.75' grinding wheel, and a buffing polishing wheel in one compact unit, allowing you to handle metal grinding, wood sanding, knife sharpening, jewelry polishing and DIY crafting projects with ease 7-Level Adjustable Speed: Powered by a 168W motor with 7-speed control (grinding wheel: 39508000 RPM; sanding belt: 9101800 RPM) and forward/reverse function. Easily switch between low-speed fine polishing and high-speed material removal to achieve optimal results Grit Variety for Enhanced Versatility: This 3-in-1 mini belt sander kit comes with 10 spare sanding belts in assorted grits 120# (2PCS), 320# (2PCS), 600# (2PCS), 800# (2PCS), and 1000# (2PCS) meeting your both coarse and fine sanding needs Space-Saving & Portable: With a compact size of 7.5 x 5.3 x 7.3 inch and weighing only 3.84 lbs, our bench sander grinder & polisher is easy to move and can be conveniently stored without taking up much space