PowerMate Safety Moving System is a motorized stair climber, tailgate lift, dock leveller, and 4-wheel hand truck in one that lifts loads up or down stairs, on and off curbs, and in and out of trucks. Wheels move longitudinally on frame and extend to 40 ins. to allow ground-to-tailgate loading as well as step-to-step climbing. Unit performs all the lifting at the push of a button, saving operators from back strain or injury. Five steel and aluminum models feature load capacities to 1,500 lbs.