The biggest problem with standard dial combination lock is that they can be cracked by trial and error. For example, if the combination lock has three dials, each dial is numbered from 0 to 9, then there are only 720 different combinations in total. Although this sounds sufficient to prevent cracking, a motivated thief may find the right combination in less than an hour.

Of course, some combination locks have more than three dials. The more dials it has, the harder it is to crack through trial and error. However, as long as there is enough time, the thief can guess the correct combination regardless of how many times the lock has been dialed.

In addition to the basic trial and error method of cracking, password locks are also prone to gaskets. Not to be confused with prying or bumping, shims involve the use of special tools called shims to open the lock. The washer is designed to retract the spring that secures the shackle to the lock body.

How about the key lock of brass padlock for sale?
Key padlock and combination lock
Since they do not contain a dial, key locks provide a higher level of security compared to combination locks. Unless the thief has the key, he or she will not be able to open it. In addition, key locks can prevent gaps better than combination locks. For these reasons, you should choose a high-quality key lock instead of a combination lock.