Material and durability - Adjustable deadbolt spring made of high strength zinc alloy for corrosion and wear resistance. It performs well in damp and cold cooling environments, delivering a long, stable service life. Automatic reset for efficiency - Built-in spring design causes the latch to automatically return to its original position after unlocking. This enables fast, continuous switching with reduced manual intervention and improved work efficiency. Security and reliability - The radiator shutter features a sturdy construction that effectively prevents unauthorized opening. Even under vibration or external shocks, it maintains lock stability to protect items inside the cooler. Ease of use - The walk-in cooler door handle is ergonomically designed for one-handed operation and quick release in emergencies. It is easy to use and enhances convenience while reducing operating difficulty. Use scenarios - In restaurant or hotel walk-in coolers, for fast access during peak service with secure closure. - In supermarket freezer rooms or cold storage warehouses, to prevent unauthorized entry while withstanding vibration. - In medical or research cold storage rooms, where reliable closure and quick emergency release are required.