Feature:1. Anti Theft Buckle: This inner door security device cannot be unlocked from the outside, but is easily unlocked from the inside.2. Sturdy and Rust Resistant: The anti theft door lock is made of sturdy zinc alloy with polished surface, not easy to rust, ensures long life.3. Extra Thick Swing Arm: Extra thick swing arm ensures strong durability and can withstand super shocks.4. Smoothly Operation: The rotating shaft is equipped with precise steel ball, 3 positions adjustable, making the door lock open and close more smoothly.5. Firm Installation: The bottom plate is thickened and has three fixing screw holes, which make the installation more firm.6. Other Use: This anti theft lock can also be installed out of children touch, so they can not open the door, providing extra safety for your kids.Specification:Item Type: Swing Bar LockMaterial: Zinc AlloyColor: Sand NickelPurpose: The door lock is a safety device for inner door.Package List:4 x Swing Bar Lock28 x Screw