Nuk3y Commercial Grade Ball Bearing Door Hinge, NRP 4-1/2 x 4-1/2 Full Mortise Brush - 3- PACK (Satin Chrome) 4-1/2" x 4-1/2" Ball Bearing Commercial Door Hinge Steel material with Steel barrel Ball Bearing Door Hinge For Smooth Opening & Closing Commercial Rated Door Hinge 0.134" Gauge Non Removable Pin (N)  Out-Swing Doors