Wrench

The Wrench is the melee weapon in BioShock. You can use this weapon to knock out enemies through out the game.

You receive this item at the beginning of the game, during the tutorial level "Welcome to Rapture".

You can't upgrade this weapon during the course of the game. You can however use tonics to to change the characteristics of this weapon.

Tonics you can purchase for the Wrench are:
 * SportBoost
 * Bloodlust
 * Wrench Jockey
 * Wrench Lurker

You will get a flat 50% bonus of the Wrench damage if you fully researched "Bouncers" slicers.