Product Material: iron Size: 6 * 3.7 * 2.3 cm Color: black, brown Quantity: 2 pieces Package content: 2 * child safety locks for sliding doors and windows 1. Window lock stop attachable area clamping distance: Sliding doors or window frames should have the correct clearance. With a rotatable switch, the distance between the window card slot can be changed. Two feet with a flexible protective cover, non-slip and protect the window card slot from being scratched. 2. Double glass door locks Double glass door locks can be used for large doors or windows, improve security. It becomes more robust, firm and stable, carefully handmade, can be reused many times 3. Easy to install no need to install other tools, each window lock knob can be fixed with one hand. Designed for horizontal/vertical windows and sliding glass doors, but not for plastic window frames. 4. Stoper Made of metal in a lock housing it is robust and durable, easy to install and use with one hand. 5. Wide range of uses: can be easily applied to most environments. By partially opening and closing the windows, thieves and burglars can be prevented from falling, and protect the safety of family members while improving air circulation. Can prevent children from opening the window is too large to be dangerous, but also prevent children from opening the sliding door to reflect something.