Door stopper

This is a quick-to-use door stopper. Seen on the internet as a task force tool to quickly keep a door from locking itself. Simply clip over a door edge or hinge to prevent it from closing.

Door stopper v1 : most of the times too large and not enough grip power
Door stopper v3: Smaller to fit the hand nicely and thicker for more strength and grip. (Scaleable for your use)