The Arrow system is a registered masterkey system utilising an interchangeable core, a feature which enables alterations to be made to locking arrangements in just 10 seconds! without needing to change the lock itself.

In the past, users of masterkey systems have often experienced delays and difficulties in maintaining their masterkey set-up especially when keys are lost or stolen or there is an occupancy change. Now with Arrow's interchangeable core, when ever there is a reason for change it is so easy to restore security. Simply use your unique Control Key to remove the existing core from the lock cylinder and to insert a new replacement. It takes just 10 seconds and no skilled labour or tools are required - not even a screw-driver!

The patented Pluscore™ system offers a totally new concept in interchangeable core key control. The system employs a unique core security feature and patented key design. The unique feature is the pin assembly which runs through the centre of the core keyway and only the patented key can operate locks fitted with the system. As the dimensions of Pluscore™ remain the same as standard cores the full range of conversion cylinders and locks can be utilised.
Supplies of Pluscore™ interchangeable cores and patented Pluscore™ keys in the U.K. are controlled exclusively by Rainer Security Products Ltd and will require, without exception, written authorisation for all orders prior to despatch. Written confirmation relating to subsequent changes in authorised personnel will also be required.
The 7 Pin patented interchangeable Pluscore™ core system offers the highest level of key security together with the masterkeying potential and the unique benefits already associated with interchangeable cores.

Both the Standard and Pluscore™ Arrow interchangeable core systems can be introduced into most existing pin-tumbler type locks by use of our extensive range of replacement conversion cylinders. In addition, a full range of custom made locks and padlocks are available to accept Arrow interchangeable cores.