double side installation capability allows pairing two locks on opposite door tracks for greatest stability, while the end hole design accommodates padlocks for added security layering Ideal for homeowners seeking stable garage security or families with internal garage doors requiring theft solution Use as a primary or supplementary during vacations, nighttime hours, or extended absences to block unauthorized access through vertical garage tracks Upgraded Stainless Steel Garage Door Prevents Break – designed with thickened construction to secure internal garage doors, providing extra theft proof defense for residential security Features erosion resistant galvanized steel body with bright red PVC handle cover for fast position visibility and finger defense, reinforced by 8 auto tapping screws for wobble easy installation, Manufacturer: Uitndvyte