Engineered to last longer, install easier and provide greater safety than conventional gate hinges. They are designed for industrial, high-traffic applications with heavy wrought-iron or aluminum gates. Double 5/8 in. ball bearings for smooth operation. 3/4 in. solid stainless steel shaft, grounded and tempered to Rockwell standards. Continuous-cycle operation,selflubricating/no-grease fittings. Offers a unique design so the gate never hits the post.