Patent Pending TruTurn 360 Castering System delivers best in class castering performance. Raises & lowers 35% faster than the competition. Patented inner and outer tube bushings provide a tight fit and lessen tube drag. Premium Sharkskin(TM) finish for optimum corrosion resistance. 20% more screw travel than conventional jacks. Stylized handles with soft touch grips. Grease fittings in key locations for easy lubrication. Mounting Hardware Included.