There have been some cases where thieves have used CO2 to freeze and then smash off a normal brass padlock to gain access. Using a high-quality padlock with ball bearing locking mechanism will give greater strength against this kind of attack than the normal brass padlocks.
We had a customer contact us regarding this very issue. They used Peli cases to hold very expensive equipment and locked them off with normal brass padlocks. Thieves used CO2 to freeze the padlocks so they could then smash them off. They asked us if there was a padlock that could withstand being frozen like this.
We advised them that the smaller, normal brass type padlock they had been currently was closed using a double locking snap mechanism. This is basically two spring-loaded bars that keep the shackle in place. The “locking bar” diagram shows this in more detail. If the padlock is frozen to a very low temperature with CO2, then this will be the weak point and will become brittle. However, on the more expensive models, they are locked with ball bearings which give the lock much more strength. Knowing that any of the locks in our ‘High Security” section are made in this way and would be suitable for this purpose meant they just needed to find one small enough to fit their Peli cases.
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