Heavy duty garage door defender locks down to the ground and stops up and over doors from being pulled up and keeps it firmly sealed. The base plate of the unit is screwed into the ground. All fixings are inside the garage so they can not be tampered with. The bar is then placed on top of the base plate and locked down using a shutter padlock to prevent the door from opening. Fully hot dip galvanised for corrosion protection and then powder coated. This provides excellent corrosion protection with a hard wearing finish. Manufactured in the UK. Requires a shutter padlock for use. (not included)