This is a genuine OEM sourced replacement part which is specially designed for use with Makita power tools. The purpose of this strain relief is 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. Keep in mind it is made of durable rubber and is sold individually.
This is an authentic OEM part. The tapping screw (4x20) is made for use with a variety of tools and devices. The metal part is sold individually. It is encouraged to purchase a spare as this item can wear over time and regular use. A screwdriver is necessary for the proper repair.