Brinks Commercial Steel Matte Brass/Black Kick-Down Door Holder Mounts to door 1 in.

Big results from such a small package. I use this to keep a big steel door propped open in my woodshop and it's done an incredible job so far. I've tried other door stops, and even made my own, but this out performs them all. It's lightweight, but very sturdy! It flips up out of the way so you can close the door when needed, but stays attached to the door so you always know where it is. You'll never misplace your door stop again! Excellent quality, excellent value. Easy 4 screw installation.

I've installed quite a few door stops similar to this but this is my favorite by far. The locking mechanism is a huge improvement over other models on the market. The stopper works flawlessly. It is obviously made very well.