Review on Efficient 4 Pack Spring Hinge Door Closer for Most Door Butt Hinges by Russ Charmin

To be honest I can't believe these things actually work, but they do. I just installed them on 4 interior doors. My kids can't seem to keep anything closed and we try very hard to confine cats to certain areas. We didn't want anything to slam the door because we didn't want to catch our finger or paw, but we had to close it. That's exactly what they do. I am very pleasantly surprised. Note. I'm only talking about lightweight interior doors. I don't know how they will behave on an external or heavy door. Installation was quick and not bad. I had a click on my finger that hurt terribly but broke the blood and nothing. Just be careful and use the door frame as a lever when installing.