A machine aboard the junk freighter used to move large pieces of equipment. It is found suspended from a rail high above ground level, and is controlled using a handle which controls motion. It is equipped with a large claw, which, when the CLAW button is pressed, lowers itself to ground level and picks up whatever it finds. The equipment can then be moved to the required location and the CLAW button can be pressed again to lower the equipment back to the ground.
Roger used the Grabber to pick up the Warp Motivator and place it in the Aluminum Mallard so that he could escape. According to some theories, Roger actually sat around in the Grabber too long, and got shot by the droid. As Roger survived the incident, this is unlikely.