Dynasty Hardware Commercial Grade Ball Bearing Door Hinge 4-1/2 x 4-1/2 Full Mortise Stainless Steel, Non-Removable Pin - 3- PACK Packed With Both Wood & Machine Screws Brushed Stainless Steel - Made Of Stainless Steel 4-1/2 Ball Bearing Door Hinge For Smooth Opening & Closing Commercial Rated Door Hinge 3.4 mm thick