This locking casement stays pin makes it easy to lock your windows and add an extra layer of security to your home. Simply replace one of your standard stay pins with the locking pin. With the casement stay in the closed position screw the lock section of the pin assembly down with the key and remove the key. The simple and traditional design will fit the majority of casement stays on the UK market and can instantly provide extra security. Comes with a 10-year mechanical guarantee. Suitable for domestic use.