Specifications:It is strong,solid and sturdy, exquisite workmanship, aluminum alloy frame that can be reused many times.There is no should set up extra tools,it equips a hex key in each window locks, retaining on the track by means of key control.Can be smoothly utilized to maximum environments;By conserving the home windows in part open and closed, the burglar-proof and thieves can prevent young people from falling and preserve the security in their families whereas convalescing air circulationName: Window lockMaterial: Aluminum alloyColor: SilverSize:25*16*11mm(0.98*0.63*0.43in),45*16*11mm(1.77*0.63*0.43in)Applicable scope: Window Package Contents:1x Window Lock Stopper Note:Due to the sunshine and display setting difference, the item's color may be barely different from the pictures.Please enable slight dimension difference because of varied handbook measurement.