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