Makita 643968-3 Brush Holder For BTW200 BTW201 BTD200 Impact Wrench

Makita 643968-3 Function: 
Electrical Connection: Its primary role is to hold the motor's carbon brushes (typically model CB-441) in precise contact with the commutator, ensuring a steady flow of electricity to the motor.
Repair Indicator: This part is commonly replaced if your impact wrench experiences heavy sparking, erratic power, or if the holder itself has melted or cracked due to motor overheating.