[Offer Safety to Children or Pets] Window restrictor hooks are designed to limit the opening of a window to 100mm, helping prevent children or pets from falling or running out, ensuring their safety. [Easy Installation] Just need a screwdriver to fix the restrictor locks to the window; complete the installation easily (comes with screws and operation manual). [Durable 304 Stainless Steel] These window restrictors offer great corrosion resistance, high toughness, and rust protection, extending service life. [Reasonable Design] Can be released to allow full opening of the window. Automatically re-engages the restricted position when the window is closed, convenient for daily use. [4PCS Right Handed + 4PCS Left Handed] Pack includes 4 right-handed and 4 left-handed restrictors for added convenience. Ideal for home, kindergarten, school, and other safety applications. Name: Window Restrictor Locks Quantity: 8 Pack Color: Silver Material: Stainless Steel Package Contents: 4 x Right Handed Window Restrictor Locks 4 x Left Handed Window Restrictor Locks 32 x Screws 8 x Safety Fixing Pins Note: Only the items listed above are included. Other products are not included. Light and display differences may cause slight color variations between the image and the actual item. Measurement error allowance is +/- 1-3 cm.