This is one of the ‘little things’ that make a difference in a car. Instead of the handbrake flopping around in its carrier mount, this combination of roller bearings, washers, and bolt with locknut smooth and reinforce the action of the system.
Makes handbrake action feel like that of a quality German auto. Shamelessly robbed–with permission–from my friend paul Cain who introduced this system on his masterful 3.8CSi.