EASY DIY PROJECT – Thanks to these Prime-Line KC16HD safety spring door closers, your next to-do is quick and easy. Use these door closers to convert hinged doors to self-closing ones. INCLUDES – (1) Surface mounted spring-loaded door closer, tensioning rod, slide plate and hole plugs to cover adjustment holes in closer body after desired tension has been set. EASY INSTALLATION – With a closer and plastic slide plate being surface mounted, installation is a breeze. This spring door closer can generate up to 150 pounds of closing force, and can be used on both left and right-handed doors. ADJUSTABLE TENSION – Easily adjust the tension on this safety spring door closer. These closers also feature adjustable closing speed. PRODUCT INFO – This safety spring door closer features a non-handed design and black painted finish to complement any style door. 1 inch wide base, 4-1/4 inch hole center spacing and 4-3/4 inch arm.