High-Security Lock Cylinders

The average Euro profile cylinder can be snapped in seconds by burglars using simple household tools, and over 20 million uPVC and patio doors in the UK are at risk. These ranges of high security cylinders are designed to withstand attack. They are easy to fit in about 5 minutes – see our measuring and fitting guide and fitting videos.

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  • Alan Jones Newbury, Berkshire

    We always receive excellent service from CIA. We also appreciated the text reminder about the service appointment.

  • Dr Dxxxxx Rowlands Castle, Hampshire

    When I need help it is available (with a smile, inferred by the telephone conversation!)

  • Southern Water Various locations throughout the South

    Thanks to the designer, project manager and all engineers whose work during this contract was carried out with efficiency, professionalism and care.

  • Mrs E Mxxxxx Havant, Hampshire

    Engineer was polite, well groomed and very helpful. Even my husband who is partially sighted understood how to use the system. The engineer even used the vacuum cleaner.

  • Ms E Cxxxxx Emsworth, Hampshire

    Engineer turned up on the date and time specified. Did a good job and left the house tidy. The alarm works. Job done!

  • Mr D Gxxxxx Cosham, Hampshire

    Friendly, helpful and accommodating.

  • Mr M Sxxxxxxxxxxx Waterlooville, Hampshire

    Polite attitude of your technician, minimum disruption.

  • Mrs ****** Chichester, West Sussex

    Recommended by a family member so have not had anyone else to quote.  Hard reputation to follow!

  • Mrs Hulmes Andover, Hampshire

    Asked questions and checked we were happy – nothing too much trouble…and all with a positive approach and a smile!

  • Mrs J Kxxxxxx Farnham, Surrey

    Had to change pre-arranged appointment and office was very helpful.