1、WORKING TIPS: Lowest speed gear is recommended for use, since high speed may cause the brush to fall off and affect the service life. 2、MULTIPLE SIZES: Different materials with different shapes are suitable for various purposes, but they all suits perfectly for fine polishing. 3、3MM MANDREL: Equipped with a 3mm mandrel, this polishing head can fit for most rotating tools, such as polisher, hand drill and so on. 4、WIDE APPLICATION: Suitable for jewel, clock, various moulds, glass, equipment, mirror, metal surfaces, etc., practical and simple to use. 5、EASY USING: Compact in size and light in weight, the changing is very convenient, and the simple installation will save your time as well.