High Quality at Low Cost Manufacturing of Locks, Case Hardware & Firearm Security Cases and Locks. Franzen offers a wide range of locking systems and hardware for case manufacturing including but no limited to: Gravity lock for waste / garbage bins, locks keyed and combination, cylinder locks, Extension handles, Wheels, Handles, Hinges. Firearm security Products include. Trigger locks, cable locks, storage and transportation cases, bore/ chamber locks.