What is a cylinder lock? A cylinder lock or Euro profile cylinder lock forms an integral part of many uPVC, composite and wooden doors. This type of lock is used in conjunction with multi-point locks and some mortice locks. By replacing this independent aspect of your door locking system, you can upgrade your home/door security in a matter of minutes and the only tool required is a screwdriver. Many homeowners are unaware of the risks associated with having an inadequate cylinder lock on their door. With incidents of lock snapping on the rise, replacing your lock cylinder is an effective and easy way of making your home more secure without having to change the entire lock or door. Read more here Is your cylinder lock a weak point of your home security? See the infographic below to understand the very real – yet largely unknown – threat.