Wrench Jockey 2

From BioShock Wiki

Wrench Jockey 2 is a Combat Tonic which increases damage dealt by the Wrench by 550%. It can be stacked with Wrench Jockey.

[edit] Game Caption

When your opponent has Wrench Jockey, how can you hope to beat him in a fight? By installing Wrench Jockey Two, of course! Don't get caught with last years' model, upgrade today!

[edit] Location

Reward for completing the second level of research for Bouncers.