【4PCS Window Door Locks for Kids】4PCS Sliding Door Locks with 8 Universal Keys, each sliding door locks comes with 2 keys (the keys are universal). 【Easy Installation】 Supplied with all security fixing accessories including stainless steel screws. (Attention: Drilling is necessary; The white cap is used to decorate the hole made by the electric drill.) 【Zinc Alloy】Made of zinc alloy, copper, anti-rust, durability and quality guaranteed. 【Child Safety Lock】Prevents accidents due to open windows and unlocked doors, helpful to protect your children. Suggest the locks be adjusted up and down for maximum security. 【Application】Suitable for most hinged or sliding doors and windows. Perfect for home, public, hospitals, hotels, schools and other children's places. Color:Black Features: Universal locks ideal for most hinged or sliding doors and windows Sold in a patio sliding door lock set of 4pcs window locks with keys < p>Each lock comes with 2 keys (keys are universal) Suggest that locks