The Autoloc Door Popper is the best popper on the market today! Autolöc’s™ Spring Loaded Door-Poppers are guaranteed to pop open the heaviest and most stubborn of doors. Autolöc™ door poppers have welded seams and are fully chrome plated, so they're rust and corrosion resistant. An Anti-scratch tip prevents damage to paint or body. Heavy Duty coil springs ensure a lifetime of smooth operation. Backed by a Limited Lifetime Warranty.Door Poppers sold individually.