Paquete de 6 herramientas rotativas de repuesto de cepillo de resorte de carbono para cepillos de motor Dremel 4000
Size: 6.3x4.8x8.4mm. Step 1: Use the wrench to open the cover of carbon brush. Step 2: Take out the carbon brush. Step 3: Replace with the new carbon brush. Step 4: Use the wrench to lock the cover well.