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 Safety And More. Reasonable Design:It Can Be Released To Facilitate Full Opening Of The Window. It Automatically Reengages Restricted Position On Closing Of The Window, Convenient For Our Use. Durable 304 Steel:These Window Restrictors With Great Corrosion Resistance, High Toughness And Rust , Extend Its Service Life. Offer Safety To Children Or Pets: Window Restrictor 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) Item Type: Window Limiter Material: Stainless Steel Weight: Approx. 47g / 1.7oz Product Size: Approx. 10x4.5cm / 3.9x1.8in Opening Angle: 65 Degree Scope of Application: Window, etc. Package Including 2 x Right Handed Window Restrictors Locks;2 x Left Handed Window Restrictors Locks;16 x Screws;4 x Safety Fixing Pin