Specifications: Lock body material: Zinc Alloy Size:as picture shown Type: Sliding Door Showcase Lock Opening and closing state key can be pulled out The difference between open lock and single lock Difference 1: The concept is different. The key and lock are universal. Any key can open any lock. This kind of lock is generally used on all kinds of safety fire doors, which can be more convenient to manage. The single lock is a keyhole outside, and the key is used to unlock the door outside. The key is used to unlock the door inside, and the knob is used to unlock the door without the key inside. Difference 2: Different functions make it more convenient to open and open the lock. The safety performance is general, and the escape function of single lock is strong. Package Included: 1 x Locks