Material: iron. Dimensions: approximately 6 x 3.7 x 2.3 cm (L x W x H). The distance from the window, the greater: 4.2 cm, the smallest: 2.5cm, please confirm your track size before purchasing. Convenient: No need to install additional tools, equip a hex wrench on each lock window, holding the track by key control. Safety Locks: This sliding window lock for home and office, can keep windows partially open or closed to avoid the hidden danger of children and pets climbing through the window. In addition, it prevents thieves from entering. Wide use: can be easily applied to most environments. By keeping windows partially open and closed, thief and thieves can prevent children from falling and protect their family's safety while improving air circulation. Note: Data is all measured manually, please allow 1-3cm error due to differences in light and display, there may be color differences, please refer to the actual item received.