The D and D Hardware door lock have been successfully tested to all the requirement of BS EN 12209.

1. Category of useOne category is identified. Grade 1: For use by people with a high incentive to exercise care and with a small chance of mis-use. 2. DurabilityThree grades are identified according to the number of test cycles achieved. Grade 4 : 25 000 Cycles Grade 5 : 50 000 Cycles Grade 6 : 100

BS EN 1154:1997 -The European standard for the performance of controlled door closing devices. Introduce in detail the product type, usage classification, test period, test period, door quality, corrosion resistance, as well as product definition, product performance requirements, test instruments,

BS EN 1935 classifies door furniture door furniture by using an 8 digit coding system. A similar classification applies to all building hardware product standards so that complementry items of hardware can be specified to, for instance, a common level of corrosion resistace, category, category of us