Lock Type:Sliding Window LocksFunction:protect the safety in their households whereas recovering air circulationIt is strong, solid and sturdy, beautiful workmanship,that can be reused many times.Adjust the screw by utilizing the hexangular key to fit the body thickness.Fit for track heights greater than 15mm/ 0.59 inch,track thickness no more than 16mm/ 0.63 inch.Wide usage: Can be easily applied to most environments; By protecting the windows partially open and closed, the burglar-proof and thieves can prevent kids from falling and protect the safety in their households while recovering air circulation.Weight: 148g/setcolour:Yellow + silverMaterial:Aluminum + plasticsize:Key length: 47mm/1.85inchWindow lock size: 30mm x 24mm x 24mm/1.18in x 0.94in x 0.94inPackage Contents:4 x Sliding Window Locks4 x KeysOnly the above kit content, different products are usually not included.Note: Light capturing and diverse exhibits can cause the colour of the object in the photograph a bit of various from the genuine thing. The dimension allowed error is +/- 1-3cm.