VEVOR Push Bar Door Locks, Stainless Steel Panic Bars for Exit Doors, with Exterior Lever and 3 Keys, Push Bar Panic Exit Device Door Hardware for Metal Wood Door, for Left and Right Handed DoorsProduct Features Panic Bar for Exit Door This push bar door lock is constructed from thickened 304 stainless steel, rust and corrosion resistant. It complies with UL and ANSI testing standards, enduring over 500,000 cycles of opening closing tests. It's also fire resistant and heat resistant, making it the ideal choice for high traffic emergency doors. The zinc alloy handle and copper lock core ensure the longevity of the lock, even in extreme weather