Triple locking mechanism

The MTL800 locking system from Lockwood provides peace of mind!

To guarantee the technical key security of a mechanical locking system it is necessary to select a system that is protected by key patents and also offers a high technical key copy protection. The MTL800 locking system from Lockwood will achieve both of these.

Lockwood MTL800 provides the highest possible level of protection against illegal key duplication via the revolutionary double alpha spring. The patented platform combines protective elements to create a triple locking mechanism, superior key control, and extensive master-keying capabilities.

  • Double alpha spring: A unique moving element on the key blade's tip that engages with unique pins, creating an additional shearline.
  • Locking Bar: A unique locking bar mechanism forms a robust security layer. Correct alignment of the locking bar pins depends upon the correct combination key being inserted into the cylinder.
The milled pattern which runs along the length of the key interacts with the top bar horizontal pins, creating the required shearline.
  • Telescopic pin: Based on Mul-T-Lock's proven telescopic pinning technology. 
    • What is the key difference between MTL800 and MT5+ ?
      The primary distinction of the MTL 800 lies in its use of patented active element double alpha springs in the key-way and double alpha pins in the cylinder system.

    • Are MTL800 keys backwards compatible with MT5+ systems?
      All MTL800 keys are fully backward compatible with existing MT5+, and MT5 systems.


    • Are there any shared components between the MTL 800 and MT5+?
      Yes, both systems use the same pinning requirements, except for alpha pins in the last chambers. Additionally, the profiles are identical in both MT5+ and MTL800.

    • What are the different components in the MTL 800 and MT5+?
      The MTL 800 introduces inner and outer alpha pins, whereas the MT5+ continues to use a single alpha pin. Each system has unique barrels. Additionally, the MTL 800 features a patented key with double alpha springs, while MT5+ keys are no longer available for purchase.

Compatible products

In the centre of Lockwood security: Premium quality MTL800 locking cylinders for any purpose. Lockwood offers a versatile range of possible applications of mechanical MTL800 cylinders combined with other Lockwood products. These locks are best installed by combining them with high quality MTL800 cylinders and can thus also be integrated into locking systems.

Outlined below is a small selection.

  • Lockwood 005 Double Cylinder Round Deadbolt

    High security Deadbolt with LockAlert® and SafetyRelease
  • Lockwood 930 and 950 Series Key in Lever Locksets

    Fire rated lever locksets.
  • Lockwood FLUID FE100 Series Exit Device Single Point

  • Lockwood High Security 334 Series Brass Case Padlocks

    Padlocks Physical Security (SP) grade range from 5-7.

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