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.

  • Chris Holiday Guildford, Surrey

    Your technician was exceptionally pleasant and helpful – a credit to your company.

  • Dr P Darling Basingstoke, Hampshire

    Have been with CIA for over 10 years now and they have never disappointed me.  The system designer showed a great deal of professionalism and expertise as well as being personable.

  • Mr Johnstone, Priory School Southsea, Hampshire

    Another great job – Many thanks.

  • Mr D Gxxxxx Cosham, Hampshire

    Friendly, helpful and accommodating.

  • Ken Nash Portsmouth, Hampshire

    We have used the security system for the last 17 years on a daily basis without one false alarm, very impressive…

  • 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.

  • Mr A***** Clanfield, Hampshire

    Local company with a good reputation and we have been very impressed so far – thank you.

  • Mrs G Richards Christchurch, Dorset

    Polite and efficient engineer who treated us and our home with respect.