* *-----: eSynic Window Security Locks Comes With Everything You Need For Installation And Use. The Package Includes 4 Window Door Restrictors, 4 Release Keys, And 16 Screws. With This Comprehensive Package, You Have All The Necessary Components To Install The Restrictors On Multiple Windows Or Doors, Ensuring a Convenient And Hassle-Free Setup Process. * - *-----: eSynic Window Safety Restrictor for Kids Is Constructed From High-Quality Materials Such As Zinc Alloy And Upvc. These Materials Are Known For Their Durability And Strength, Ensuring That The Restrictor Is Built To Last. The Sturdy Construction Adds Reliability And Longevity To The Window Locks. * *-----: eSynic Window Opening Restrictors Are Compatible With Different Materials Such As Upvc, Wood, Aluminium, And Metal. This Broad Compatibility Allows For Easy Installation On Various Window And Door Types. * *-----: eSynic Pvc Window Restrictors With Key Is Suitable For Most Types Of Windows And Small Doors, Making It a Versatile Solution For Various Settings. Whether It's For Homes, Public Establishments, Or Commercial Spaces Like Hotels And Schools, The Restrictor Can Be Easily Installed And Utilized. * - *-----: This eSynic 4pcs Restrictors Windows Locks Limit The Distance That a Window Open. They Can Be Removed From One End And The Window Can Be Opened Fully With Keys. Perfect For The Children Safety And Anti-Theft.