As a professional manufacturer & direct factory of metal zipper polishing machine, ZHENYU zipper machine has differnt type of metal zipper polishing machines, like 8 round, 12 round, 16 round and 24 round of zipper surface polishing equipment.
Fully auto 8 round zipper polishing machine is apply to metal zipper tooth head polishing.
Automatic 12 round is valid for flat teeth zipper polishing, zipper teeth are polished from the direction of the vertical and horizontal, ensure a complete and smooth teeth.

Y teeth zipper polishing machine 16 round is apply to Y-type teeth polished. 
24 round is normally apply to long chain zipper teeth polishing.