Bosch offers a full selection of crimped and knotted wire cup brushes. Bosch stiff stringer bead knotted wire wheels with extremely narrow tufted faces that provide aggressive action. A maximum number of knots ensure longer life. Ideal for bead weld preparation and confined areas such as cross-country pipelines and pipe fabrications, also useful for brushing expansion joints and narrow grooves. The precision-balanced cup virtually eliminates vibration.