Secure-A-Lock&trade; is a compact deadbolt lock restrictor designed to prevent a deadbolt from being opened, even with a key, from the outside of the door. Protect your family with deadbolt security! 9 inches tall by 3 inches wide Lightweight attaches in place in seconds Ideal for hotel rooms, dorm rooms, traveling, rentals Prevents key from turning deadbolt from the outside Fits all standard deadbolt locks-Weight 3 ounces Folds in half when not in use similar to a portable phone