This cord protector is a genuine Milwaukee replacement part and is sold individually. Cord Protectors are designed to slide onto your cord and fit securely at the end, where it's firm rubber will protect the base of the cord from getting bent and pinched, which can expose the wires and become a safety hazard.
This is a genuine OEM replacement part. This steel bearing is used in a variety of Milwaukee handheld power tools including rotary hammers and Sawzalls. Ball bearings serve to separate and buffer moving parts. They also assist with directional stability. They are therefore a high-wear part that is replaced regularly. This item is sold individually. Retaining rings and spacers sold separately.