The Red Book is an invaluable free resource for anybody searching for independent information on security equipment, the book is available to download online at www.redbooklive.com As well as steel security doors there are other types of physical security equipment listed from security grilles to shutters, it enables the buyer to be confident that the equipment they are planning to purchase has been independently tested to a recognised standard of the level of security it offers. The equipment is usually tested to LPS 1175 but there are also European standards as well. Accredited equipment is recognised by the insurance industry as well as the Police through their Secured by Design initiative. Any manufacturer that wishes to have their equipment tested and appear in the red book first need to achieve ISO 9001 accreditation, ISO is not a security test but it does mean the doors are manufactured to a consistent quality standard and have systems in place that can be independently audited. Testing and accreditation costs money the doors are going to be more expensive than the the unaccredited alternatives, but customers can be sure that a tested security door is going to be fit for purpose and manufactured to a high standard, this may not be true of many of the cheaper steel doors on the market which are being sold as security doors but in some cases are less secure than the wooden doors they replace.