The rotary tumbler made of tough polycarbonate features an integrated molding technique leakproof design and long service life The new gear transmission structure ensures a smoother and more stable operation without breaking worries. Taking the principle of centrifugal motion, this jewelry tumbler can improve the polishing efficiency 5 to 10 times. This rotary tumbler can improve the workpiece's specification precision and delicate shapes, forming a smooth and gloss surface. The jewelry polisher tumbler has the function of bidirectional rotation, 5 speeds, and a timer from 10-60 minutes. The working time and speed can be adjusted according to different materials and surface requirements. User-friendly Design: The tightly designed buckle has good air tightness. No need to worry about leakage. The bottom of the jewelry tumbler machine adopts a wear-proof rubber pad, which is non-slip, stable, and shock-proof.