Chain door guards can use wooden or metal doors on different types of doors and can be placed above or next to the door frame. The latch is easy to install and durable.Stainless steel material, elegant and high quality, durable, ensuring quality and lifeAnti-theft spring lock prevents daily scratches, corrosion and discoloration, and provides reliable protection for intrudersEasy to install and use security door; cannot be unlocked from the outside, easy to unlock from the insideMounting hardware included: 1 anti-theft chain and 4 screwsMaterial: Stainless steelInstallation method: screws.Dimensions: 122 x 22 x 2 mm (L x W x H). Chain length: 195 mm. Mounting hole diameter: 4 mm. Scope of delivery: 1 anti-theft chain and 4 screws. Product features: provides more security on residential and apartment doors, solid stainless steel hanging ball.