ITEM NAME:10Pcs/Set Sliding Window Locks Stop Aluminum Alloy Door Frame Security Lock N2W3 10Pcs/Set Sliding Window Locks Stop Aluminum Alloy Door Frame Security Lock N2W3 1.100% brand new 2.It is strong,solid and sturdy, exquisite workmanship, aluminum alloy frame that can be reused many times. 3.There is no need to install extra tools,it equips a hex key in each window locks, holding on the track by key control. 4.apply to track heights more than 1.5 cm/ 0.6 inch,track thickness no greater than 1.6 cm/ 0.63 inch 5.Suitable for easily applied to most environments; By keeping the windows partially open and closed. colour:Silver Material:Aluminum alloy Package Contents: 10 * Window Lock 1 * Yellow key 1 * L key 4 * Screw (8mm1 20mm3).10 Window Lock. Material:Aluminum alloy.