You can quickly draw a hidden weapon to make a deadly strike.
Prerequisites: Sleight of Hand 5 ranks, Quick Draw.
Benefit: After you have used the Sleight of Hand skill to successfully conceal a weapon, you can draw that weapon as a move action instead of a standard action. An opponent that was unaware of the concealed weapon is treated as flat-footed against the first attack you make in that turn.
Source: Complete Scoundrel, page 87.