ITEM NAME:4 Sets Adjustable Sliding Window Locks Stop Aluminum + plastic Door Frame S P3T1 4 Sets Adjustable Sliding Window Locks Stop Aluminum + plastic Door Frame S P3T1 Lock Type:Sliding Window Locks Function:protect the safety of their families while improving air circulation It is strong, solid and sturdy, exquisite workmanship,that can be reused many times. Adjust the screw by using the hexangular key to fit the frame thickness. Fit for track heights more than 15mm/ 0.59 inch,track thickness no greater than 16mm/ 0.63 inch. Wide usage: Can be easily applied to most environments; By keeping the windows partially open and closed, the burglar-proof and thieves can prevent children from falling and protect the safety of their families while improving air circulation. Weight: 148g/set colour:Yellow + silver Material:Aluminum + plastic size:Key length: 47mm/1.85inch Window lock size: 30mm x 24mm x 24mm/1.18in x 0.94in x 0.94in Package Contents: 4 x Sliding Window Locks 4 x Keys