Investment cast 316 stainless steel designed for applications where both extra strength and corrosion resistance are required. The integral nylon bearings promote rattle-free, silent movement and give the hinge a smoother action. The bearings also disburse the weight of the door compensating for heavier doors and increased use. Commercial ANSI templated screw hole pattern. Installs with eight 1/4" FH fasteners (not included).