Made in the USA The World’s Only Fold Up Door Stopper is a heavy-duty door stopper originally designed by a firefighter for emergency services. However, Fat Ivan proves vital for many fields including Fire, Police, Commercial, Residential, Hotel/Motel and all deliveries. The easy one-handed operation opens quickly for insertion and never slips off hinge, guaranteed. Just place Fat Ivan on any hinge, top, middle or bottom; then let it go and walk right through. FatIvan folds up quickly and stores in any space. You can also attach it to any metal surface with the embedded magnets. Safe, Durable and Reliable, Fat Ivan is convenient for everyone!