20 participants are admitted to the competition, divided into 4 groups of 5 people each. Each competitor will position himself in his own place, assigned by drawing lots. You must use your own tools and only hand picks are allowed. Each participant will receive a padlock or cylinder commonly used throughout the country. The cylinders on the various tables will have the same ciphers. The competition takes place in 5 rounds of 5 minutes each. At the end of each round, each contestant passes the cylinder or padlock just manipulated to the contestant on their right. When a contestant, during a round, opens the cylinder or padlock he must raise his hand and say “open”. A race assistant will take note of the time taken to unlock and will ensure that the cylinder or padlock is delivered to the next competitor in the locked position. To access the final, the sum of the number of cylinders and padlocks opened and, alternatively, the sum of the time spent unlocking them will be taken into account.