Product description Material: iron Size: 6*3.7*2.3 cm Color: black Quantity: 2 pieces Package content: 2* child safety locks for sliding doors and windows 1.Window lock stoper attachable area clamping distance: Sliding Door or Window frames should have proper clearance. With a rotating switch, the distance between the window card slot can change. Two feet with a flexible protective cover, non-slip and protect the window card slot is not scratched. 2.Double Glass Door LocksDouble glass door locks can be used for large doors or windows to improve security. It will be more sturdy, firm and stable, elaborately handcrafted, can be reused many times 3.Easy to installno need to install other tools, each window lock rotating button can be fixed with one hand. Designed for horizontal/vertical windows and sliding glass doors, but not for plastic window frames. 4.Metal stoper in a lock body It is strong and durable, easy to install and operate with one hand. 5.Wide range of uses: can be easily applied to most environments. By partially opening and closing the windows, thieves and thieves can prevent children from falling, and protect the safety of family members while improving air circulation. Can prevent children from opening the window is too big to be dangerous, but also prevent children from opening the sliding door to mirror something.