Can all padlocks be successfully shimmed open?

Not all padlocks can be successfully shimmed open, but many conventional ones can be. Shimmying involves using a shim to bypass the locking mechanism, which is effective on certain types of padlocks, especially those with lower security designs. High-security locks often incorporate anti-shimming features that make this method ineffective. Therefore, the ability to shim a padlock largely depends on its design and security features.