Abstract: The present invention is a block including a hollow housing within which a cylindrical container is loosely received and retained against axial motion relative to the housing. A hook supporting shaft is inserted within this container and the shaft is axially slidable relative to the container within predetermined limits. A shock absorbing mechanism within the container dampens the sliding motion of the shaft. The last named mechanism may include a dashpot with a dashpot housing mounted to the shaft and piston supported by the container. A flange projecting outwardly from the dashpot housing slidably engages the internal surface of the container and guides the sliding of the shaft. The housing includes a base member through which the shaft is inserted into the container. An annular collar comprised of two axially split collar sections is assembled around the shaft after the shaft is inserted through the base member. This collar comprises an end member of the container.