European profile lock cylinders are the most popular type on the market. They usually have the same shape but differ in material, size, brand and especially in the type of key and locking mechanism. Lock cylinders offer security features such as anti-picking, anti-drilling, anti-shattering and anti-

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