Do not run in excess of 15,000 rpm. Therefore, do not use with a Single-Speed MultiPro Rotary Tool or a Heavy-Duty Flex-Shaft Tool unless you use a Speed Control. 
Superior effectiveness on flat surfaces or hard to reach areas such as small crevices and slots in a variety of material.
Material:Steel wire
Color:As the picture
Size:Approx T shape brass brush Dia 25mm,40.8mm(L);U shape brass brush Dia 15mm,50mm(L);Pen shape brass brush Dia 5mm,52mm(L)

Package Included:
2pcs brass brush
Note:Always read and follow all safety instructions of your rotary tool and always wear eye protection.