I bought these to hold open my classroom's heavy metal door that leads to the courtyard. This door also has one of those hydraulic things that close it, so it really, really wants to close. I went through many doorstops that either couldn't hold the door open or ended up being chewed/crushed to capacity. These doorstops are AMAZING. It holds the door open, still shows no signs of wear (it's been a few months), it's reversible so I can just drop it on the floor and slide it into position with my