1.GOOD CONDUCTIVITY 2.HIGH COPPER CONTENT 3.LONG LIFE,LITTLE SPARK AND SAFE 4.BEST GOOD QUALITY AT BEST PRICE

1.ANTI-ELECTRICAL INTERFERENCE

2.BEST PERFORMANCE

3.ALL 3 KINDS OF QUALITIES FOR CHOICE. THE BEST QUALITY COULD BE USED FOR 150-200 HOURS

black&decker carbon brush