zvd 4 pieces window jammer locks, sash blocker window jammer, door window restrictor security for upvc, pvc, doors, windows white

superb quality the sash blocker window blocker is made of high quality aluminum alloy, durable door and window lock, not easy to rust sash locks, and white paint finish, strong nails, a thick lock body, sturdy for long time use. easy to install fix the files locks with corresponding screws. securit