【2 WAY INSTALLATION】: With 2 Metal Plugs and 2 Punch-Free Metal Mounting Plates, One is Punching Installation(Hole Caps are Provided) and the Other is Non-Punching Installation(Fixed Plates are also Provided) 【HIGH QUALITY MATERIAL】: The Sliding Patio Locks Are Made of High Quality Zinc Alloy. Better Preservative and Better Wear Resistance. 【COMING WITH KEY】 Each Sliding Door Locks are with 2 Keys.(The keys are Universal). Also These Sliding Patio Locks are Supplied with All the Security Fixing Accessories. 【EASY TO USE】:Easy to Install the Locks and Convenient to Use, Supplied with All the Security Fixing Accessories, Include Caps Stainless Steel Screws 【SECURITY】:This is A Kind of Sliding Patio Door Catches Set Window Bolt Security Lock, Avoid Accidental Opening of the Window, Extra Security for Your Child and Window, Suggested that Locks are Fitted Top and Bottom for Maximum Security, Home Secure System Upgraded., Manufacturer: Color