Cylinder locks are designed to cater for a large range of uses, which means that they are available in a variety of types and sizes. The most popular version of this lock is the Euro cylinder, as it is used on most modern uPVC doors. Cylinder locks also have a kitemark and star rating system which is featured on each lock to determine the security rating against attacks. These protection levels range from 1 to 3 stars and cover against cylinder drilling, lock bumping and lock snapping methods.
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