Usage Tips:[Offer 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, Their . [Easy Installation] Just Need a Screwdriver to Fix the Restrictor Locks to the Window, Complete the Installation (Come with Screws and Operation Manual) [ 304 Stainless Steel] These Window Restrictors with Great 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. [2PCS Right Handed + 2PCS Left Handed] It Is More Convenient to Have 2PCS Right Handed and 2PCS Left Handed Items in the Pack. Be perfect for Home, Kindergarten, School and More. Name:Window Restrictor Locks Quantity:4 Pack colour:Silver Material:stainless steel Package Contents: 2 x Right Handed Window Restrictors Locks 2 x Left Handed Window Restrictors Locks 16 x Screws 4 x Fixing Pin Only 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.