A multiple anvil fixture possesses multiple anvils engaged to a base in a fixed relation to each other with the anvils oriented in a common direction. Each of the anvils includes a first structure and a second structure. The first structure and the second structure are slidably engaged. Each of the anvils has an extended position and a recoiled position and a biasing-element to bias the first structure and the second structure in the extended position. The multiple anvil structure can be used to rivet brackets onto containers. The anvil protrudes through the container in the extended position to help align holes in the feet of the brackets with openings in the container. The anvil then recoils beneath the container to serve for the fixation of rivets.