keys hanging on shop display

Mechanical System Guide 

The correct choice for your specification 

Frequently Asked Questions

Discover the full range of cylinder profiles

From entry-level single-coded cylinders right through to copy-protected Masterkey systems, DOM offers a full range of solutions to suit a variety of budgets, security requirements and specifications.


Every building has its own set of specifications based on its purpose such as; the number of doors, function and access requirements, therefore choosing the right security system is essential. Here at DOM, we recognise the importance of selecting the right system type for each project.

Customers can choose from conventional or reversible systems, and mechanical cylinders can be combined with access control products allowing for endless possibilities.

rs Sirius- Patented security cylinder with extensive masterkey capabilities

  • The exceptional design of Sirius makes it very difficult to duplicate
  • High level of drill and pull protection
  • Sirius comes with a long patent, safeguarding your investment
  • Ideal for use in complex masterkey systems
  • High value, high volume product with affordable pricing
  • Designed with a long key neck for easy accessibility

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Sigma Plus - Ideal entry level secure cylinder

  • Modular technology allows for any cylinder size 
  • High level of drilling and pull protection 
  • Easily integrated into new or existing digital locking system 
  • BS EN1301 certified and trademark protected 
  • Available as a master key system or single-coded option 
  • High-security product suitable for medium to large-scale projects

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ix Teco - Patented security cylinder with an innovative stamped recess on a reversible key

  • Reversible key profile offers a high level of security
  • Sophisticated patented design with a stamped recess in the key ensures the highest level of copy protection   
  • Compatibility with modular technology allows any cylinder size along with added snap and pull protection 
  • Supplied as master key system or single coded option 
  • Can be specified in combination with DOM digital products  
  • Suitable for large-scale, complex projects 

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ix Twido - Patented high-security cylinder with a float-mounted roller on a reversible key

  • Reversible key profile offers a high level of security
  • Sophisticated patented design with float mounted roller in the key ensures highest level of copy protection
  • Compatibility with modular technology allows any cylinder size along with added snap and pull protection
  • Supplied as master key system or single coded option
  • Can be specified in combination with DOM digital products
  • Suitable for large-scale, complex projects

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Titan - BSI One star kitemark cylinder with a SoldSecure Gold rating

  • Supplied as a master key system or single-coded option 
  • Tested and certified to meet BSI one-star security standards
  • SoldSecure Gold rated 
  • Offers a high level of drill protection 
  • Large number of locking combinations 
  • Suitable for small to medium-scale projects 

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Contact us for more information

We are happy to help with any questions that you may have