Description: [Sturdy Material]:The Window Restrictor Lock is made of stainless steel metal material,which is strong,durable and firm.The chain is coated with a protective layer and has a long wear resistant life. [Scope of application]:Window Lock is suitable for most families.It does not require a window,and the ventilation spacing can be freely set.It can be used for both sliding for windows and sliding for windows. [Security Window Lock]:The Window Chain Lock is fixed with screws,comes with keys and screws,complete accessories,and is easy to install.Fits most doors and for windows.Prevents your children from opening for windows by mistake. [Easy to Install]:The Sliding Door Lock can be easily installed using drilled screws,the buckle is tight and firm,and it will not loosen when pulled hard. [Multi Purpose Use]:Security Lock is ideal for a variety of environments,including homes,public places,,hotels,schools and commercial applications. Specifications: Material:Stainless Steel Size: 22cmx5.2cm/8.66inch x 2.05inch Note: 1.This is not infant toy,please take away from children to avoid eating. 2.Please allow slightly errors due to manual measurement and different monitors. Package included: security lock 2 keys 5 screw accessories