CNBTR 11.7 x 8x5mm Electric Carbon Brushs Replacement for Electric Motor Set of 20 Made of high-quality materials for long durability,easy to mount and use. This replacing brushes can fix an intermittent motor Good replacement for worn brushed, to restore a motor's electric braking. Carbon motor brushes are one of the most components for power tool, suitable it for electric hammer, electric drill, angle grinder, etc.