Abstract: A lock includes first and second mating members. The first member is an elongate member with a first and second ends. The first end has a first transverse dimension and is provided with a plurality of first anti-rotational elements. The second end defines a head with a second transverse dimension greater than the first transverse dimension. The second member has a cavity configured to receive the first end of the first member. The cavity is provided with a plurality of second anti-rotational elements that engage and lock with the first anti-rotational elements when the first end of the first member is inserted into the cavity.