Master Key Systems MKS Ltd is a family owned business that has been designing and manufacturing Cylinder Master Key Systems for over 25 years. We stock a wide range of products, including our own designed and manufactured 5 & 6 pin master key system. This was developed from its predecessor, the E Suite 5 pin, which has been in general circulation for over 15 years in applications as diverse as B&B's to Ministry of Defence sites. Promaster has been developed from our very successful PRO series and is an entry level BSEN 1303 accredited range of cylinders including the very latest TS007 1* & 3* cylinders for Master Keying. About Us: Established in 1994, we are a family owned business specialising in the manufacture of door cylinder locks for a wide variety of applications. A highly motivated service oriented company, the same production team has been together for over 20years. We are dedicated in providing a first class service together with a wide range of quality products to suit all locking applications, be that a large complex academy, school, care home to a small HMO. We are located in the heart of the UK’s Lock Industry, with over 3500sq ft of manufacturing and office space within a secure compound with 24hr camera surveillance. We have a reliable source of industry trained operatives and distribution is via a blue chip Midlands distribution company. Technology: We use the latest computerised key cutting technology which ensures accurate key cuts every time. Key & cylinder engraving is carried out on both laser and traditional machines all of which are computer driven.