INCLUDES, (1) Surface mounted spring-loaded door closer; works on doors up to 150 lbs.; non-handed; adjustable tension; U.L. listed; 1/2 hour fire rated EASY DIY PROJECT, Installation of these KC11US safety spring door closers is quick and easy. Use these door closers to convert hinged doors to self-closing ones CAN BE USED ON HEAVY DOORS - These spring door closers can be used on doors up to 150 lbs., and they can be used on both left and right-handed doors. Easily adjust the tension on this safety spring door closer To prevent over-tensioning, adjust closer one quarter turn at a time and test door after each adjustment PRODUCT INFO - This safety spring door closer features a non-handed design and White-painted finish to complement any style door 1 inch wide base, 4-1/4 inch hole center spacing and 4-3/4 inch arm Do not overtighten, turning past 4 hole positions will cause this item to fail Please refer to the line art drawing for dimensions and compare with your needs before ordering