The most cost effective type of sash jammers (also know as turn locks) are the non locking variants. These simply twist into place providing extra security for your door or window. They are called non locking sash jammers as they don't lock into place using a key like the key locking version. This means they can be easily opened in the event of a fire but also make them vulnerable to children potentially opening them. We stock a range of sash jammers including the Schlosser Technik sash jammer, one of the market leading products.