1.100% brand new2.It is strong, solid and sturdy, exquisite workmanship, aluminum alloy frame and stainless steel screws that can be reused many times.3.Adjust the stainless steel screw by using the hexangular key to fit the frame thickness.4.Fit for track heights more than 15mm/ 0.59 inch,track thickness no greater than 16mm/ 0.63 inch.5.Suitable for easily applied to most environments; By keeping the windows partially open and closed, the burglar-proof and thieves can prevent children from fallingcolour:SilverMaterial:Aluminum alloyPackage Contents:20 * Sliding Window Locks4 * key4 * L key (bend type)20 * 20mm Screw20 * 8mm ScrewOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.