This carbon brush is used for Bosch 2-20 electric hammer, 110/220V,50/60HZ are availble in our workshop. This carbon brush is used for Bosch 2-20 electric hammer, 110/220V,50/60HZ are availble in our workshop. Other model carbon brushes is used for Bosch, Makita, Metabo,Hitachi, Dewalt,B&D brand are available in workshop. carbon brush