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.

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.

Abstract: Engagement lock comprising two members (1 and 2) which can be interlocked after they are passed through the locking rings (3, 4) of a container. The first member (1) is rod-shaped and has a head (5) which cannot pass through the locking rings (3, 4). Opposite the head it has an insertion end (6) of metal. The lock cannot be broken by bending the rod-shaped body from side to side because this body has a core of steel wire (12) whose elongation extends into the head. The elongation of the steel wire (12) is embedded in polyacetal which also forms the head (5), and the layer of polyacetal around the steel wire (12) has one or more annular grooves (14) in which it can break by bending the rod-shaped body.