Awesome wedge perfect for commercial steel doors. Use it all the time for stair well doors for ventilating. Easy to deploy and hang on the door hinge. Will be buying another one.

I bought this chock about two months ago to replace a wooden chock on my helmet that had gotten contaminated. immediately I put this chock in my helmet and have used it several times with no failures. today i used the hinge hanging feature on an exterior door to prevent a lockout, and upon clearing the scene another member of my engine went to close the door not knowing the door was chocked with the product. after pushing the door in we heard a crack and I thought my new chock was snapped but in fact it was the hinge that had snapped off the frame leaving the chock in place and un damaged and we were shocked.