20years of professional door lock manufacturing Hook Lock body Cross Keys Black Painting & Chrome Zinc ... experiences, like privacy door lock, roller shutter door lock, closet lock , security door lock, tubular door lock, knobs door lock etc.2. Black ... tongue4. The part # for this aluminium alloy hook lock is 41055-STB. 5. Three Cross keys each lock6 ... 250,000 pieces each month. Cross Key Deadbolt Lock