S. Parker Self Closing Slim Spring Hinges 4-1/2" X 4-1/2" For Medium And Heavyweight Metal Or Wood Doors In Satin Chrome Finish (Set Of 3 Hinges) Packed with # 12 wood Screws And #12-24 Machine Screws for metal Doors. Adjustable spring tension can be increased or decreased by using the included Allen Wrench. Can be installed on right Hand or left-Handed doors measuring 4' X 8' and up to 180 LB. Comes complete with a Allen wrench, Adjusting pins, and Instructions. Automatically closes door Alternative to overhead mounted Door Closers.