FEATURES: The XFORT locking sash jammer is effectively a robust door stopper and sash window lock. It is a must-have for your home for enhanced security, preventing intruder access through your front door, other external doors or uPVC windows. This is achieved by preventing the levering of the door leaf or window sash. A quick, low-cost door and window security solution that can be fitted to uPVC doors and windows that open in or out.