[Offer 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. [Easy Installation] Just need a screwdriver to fix the restrictor locks to the window; complete the installation easily (comes with screws and operation manual). [304 Stainless Steel] These window restrictors offer great resistance, high toughness, and rust protection, extending service life. [Reasonable Design] Can be released to allow full opening of the window. Automatically re-engages to restricted position when the window is closed, convenient for daily use. [2PCS Right Handed + 2PCS Left Handed] Pack includes 2 right-handed and 2 left-handed restrictors for added convenience. Ideal for use in homes, kindergartens, schools, and more. Name: Window Restrictor Locks Quantity: 4 Pack Color: Silver Material: Stainless Steel Package Contents: 2 x Right Handed Window Restrictor Locks 2 x Left Handed Window Restrictor Locks 16 x Screws 4 x Fixing Pins Note: Only the above package content is included; other products are not included. Light and different display settings may cause slight color variations between the image and the actual item. Measurement error allowed is +/- 1-3 cm.