Steel wire: The 18.5cm thick steel wire has good toughness and durability, can withstand a certain amount of pressure, is not easily broken or damaged, and effectively prevents the window from being opened accidentally. Zinc alloy base: The zinc alloy base is sturdy and durable, wear-resistant, scratch-resistant, waterproof and sun-proof, and can be used indoors and outdoors for a long time without being easily deformed and damaged. With key: The restrictor lock is equipped with a key, and parents can put the key in their hands to easily control the opening and closing of the window to prevent accidental opening and ensure the safety of their family. Family safety: Window restrictor locks can prevent children and the elderly from opening windows inadvertently, ensuring that they cannot climb out of the window or accidentally fall, thereby avoiding potential safety hazards. Easy to install: Simple and convenient installation, just place the base first, then use the matching mounting screws to fix it with a screwdriver. It is firm and will not shake or fall, ensuring long-lasting and stable protection.