The XFORT locking sash jammer is a robust door stopper and sash window lock, designed to enhance home security and prevent intruder access through front doors, other external doors, or uPVC windows. It works by preventing the levering of the door leaf or window sash, offering a quick and low-cost security solution. This jammer can be fitted to uPVC doors and windows that open either inwards or outwards. It features a durable locking arm that stays securely in place once locked with a key, providing added resistance against forced entry. The product is available in white or dark brown finishes to complement home décor and includes 1mm and 2mm packers for a secure fit. Additionally, these locks can help ensure child safety by preventing them from opening windows or doors independently.