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