Abstract: An assist strap is installed by rotating an assist strap handle to drive a mandrel, in the base of the assist strap, into a projection in a service on which the assist strap is mounted. An apparatus for mounting an assist strap in a motor vehicle includes projecting fastening means extending from the base of the assist strap and a mandrel mounted to slide between a first position disengaged from the fastening means and a second position wherein the mandrel engages the fastening means to limit the movement of the fastening means thereby locking the fastening means to the vehicle body structure. A handle may be mounted to the base for pivotal movement such that applying a force to the handle drives the mandrel from the first position to the second position.