This replacement part is a screw. It is a fastening component which secures other parts within the equipment.If the screw has become stripped, it might be unable to hold other parts in place. If the part is lodged in place and is unable to perform the appropriate action, it should be replaced as soon as possible. This is a genuine replacement part made by Dewalt. It is an OEM replacement part which will ensure a proper fit. This part is sold individually.