Every locksmith knows that disk padlocks are very difficult to pick. Even in hand, these locks resist picking techniques and it's often not worth the time and effort to pick a padlock that can be quite inexpensively replaced. This is even more the case if you happen to have a bunch of disk padlocks to work with.
The LT605 is a special vise that secures the padlock and aligns your drill bit exactly at the shear line. When you drill out the plug, you drill it out quickly and efficiently because your bit has zeroed in on the sweet spot and taken out the plug just at the shear line. It's a very handy tool to have around.