Usage Tips:[Offer Safety to Children or Pets] Window Restrictor Hooks Are Designed to Limit Opening of a Window to 100mm, Prevent Children or Pets from Falling or Running Out, Ensure Their Safety.[Easy Installation] Just Need a Screwdriver to Fix the Restrictor Locks to the Window, Complete the Installation (Come with Screws and Operation Manual)[Durable 304 Stainless Steel] These Window Restrictors with Great Corrosion Resistance, High Toughness and Rust Protection, Extend Its Service Life.[Reasonable Design] It Can Be Released To Facilitate Full Opening of the Window. It Automatically Re-Engages Restricted Position on Closing of The Window, Convenient for Our Use.[6PCS Right Handed + 6PCS Left Handed] It Is More Convenient to Have 6PCS Right Handed and 6PCS Left Handed Items in the Pack. Be perfect for Home, Kindergarten, School Safety and More.Name:Window Restrictor Lockscolour:SilverMaterial:stainless steelPackage Contents:6 x Right Handed Window Restrictors Locks6 x Left Handed Window Restrictors Locks48 x Screws12 x Safety Fixing PinOnly the above package content, other products are not included.Note: Light 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.