The Roberts 10-254 power lok carpet stretcher is the most advanced power stretcher available. The switch handle locks into 17 different stretch/pattern holding positions. The low profile head with side kicking platform makes it compatible with knee kickers. The 18 In. tail block includes a foam wall protector and wheels for easy repositioning. Stretch up to 23-1/2 Ft. with included extension tubes Swivel head for stretching angles or corners Variable pin penetration for different carpet thicknesses Unit includes one power unit, tail block with wheels, three extension tubes, quick lok tube, and durable carrying case with wheels