1.4PCS Sliding Door Locks with Universal 8 keys, Each Sliding Door Locks Comes With 2 keys (The Keys are Universal). 2.Supplied with All the Security Fixing Accessories, Include Caps Stainless Steel Screws. 3.Made of Zinc Alloy Iron Copper, Prevent Rust, Durability and Quality Guaranteed. 4.Prevents Accidents Due to Open and Unlocked Doors, Useful for Protecting Your Children. Suggested that Locks are Fitted Top and Bottom for Maximum Security. 5.Suitable for Most Hinged or Sliding Doors and Window. Perfect for Home, Public, Hospitals, Hotels, Schools and other Children's Places. Colour:White Material:Zinc alloy Package Contents: 4 x Sliding Door/Window Locks 8 x Keys 8 x Caps 16 x Stainless Steel Screws Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.