The Damper Stop Clamp is installed on the chimney damper blade to prevent accidental full closure of the fireplace damper while the gas log set is burning in your fireplace. This new Patent Pending design allows quick installation without using tools. Perfect for the weekend handywoman or handyman getting their home ready for the Realtors Home Inspection, or just for safety and code compliance. The solid stainless steel bolt prevents corrosion and rust in the critical flue spaces. This fireplace damper clamp meets strict California building codes and exceeds the similar codes of other states. Simple step-by-step English language instructions are included.