Polishing machines are available in single to multiple groups for your selection. For those with less stringent brightness requirements, a single-group polishing machine is sufficient. However, for higher smoothness demands, a multi-group machine is necessary, as it uses multiple polishing heads to grind the workpiece surface simultaneously. This equals multiple polishing passes in one go, resulting in a significantly brighter finish than a single-group machine. Additionally, the workpiece's original dimensions are not altered after polishing. Excellent polishing results can be achieved on various metal materials.