Home security is facing a new threat called lock bumping, a technique used by thieves to break into peoples homes within seconds and without any sign of forced entry . The effects can be devastating for victims. As well as losing valued possessions and the trauma of knowing someone has been sneaking around your home,in most cases of lock bumping crimes your insurance company may not pay out. its now time to fight back. Properties particularly at risk are those fitted with cylinder mechanisms, this applies to all UPVC doors and composite doors. Also most static caravan doors and some garage doors are fitted with cylinder locks.