DURABLE & RELIABLE MATERIAL- The 5 kg rotary tumbler, made of tough polycarbonate, has the leak-proof function and long service life. Roller Capacity: 4.5L, Roller Size: 18 cm x 19 cm, Maximum Workload: 5KG, Power: 60W. POWERFUL PERFORMANCE- Take the principle of centrifugal motion, high-efficiency polishing, improve work efficiency 5 to 10 times. This jewelry tumbler utilizes iron beads or steel balls to work on the surface of the workpiece. This rotary tumbler can improve the workpiece's specification precision and geometrical shapes and make the surface of the workpiece smooth and gloss. FLEXIBLE ADJUSTMENT- The jewelry polisher tumbler with bidirectional rotation and 5 speeds & timer from 10-60 minutes. The working time and speed can be adjusted according to different materials and different surface requirements. USER-FRIENDLY DESIGN- The tightly designed buckle has good airtightness, worry-free. The bottom of the jewelry tumbler machine adopts wear-resistant rubber pad: non-slip, stable & shock-proof. VARIOUS APPLICATION- Ideal for jewelry, steel, iron, copper, zinc, aluminum, magnesium alloy materials such as surface polishing, chamfering, trimming, rough finishing, precision polishing, removing black spots and fine grinding. Maintenance: 1: When the polishing liquid splash on the machine, it should be promptly wiped to prevent the machine's damage. 2: Clean the machine with a rag after using 3: The polishing barrel should be aligned with the two-axis rolling to avoid polishing barrels being thrown off the track.