Only two simple steps to installing the Trailer Wheel Lock
First,
from the axle side of the wheel, you simply slide the long leg of
the Trailer Wheel Lock through the slot in the wheel, while you
hook the short leg of the Trailer Wheel Lock around the leaf spring
of the trailer.
Second,
from the lug nut side of the wheel, simply apply the appropriate
lock through the appropriate slot as close to the wheel as possible.