Needs review
Source: Dungeonscape

Description: You are adept at maneuvering and fighting in tight spaces and underground passages.

Prerequisites: Base Attack Bonus +1

Required for: Stoneback, Tunnel Riding

When squeezing into or through a tight space, you do not take a penalty on your attack rolls or to your Armor Class.

Special

A fighter can select Tunnel Fighting as one of his fighter bonus feats.

Normal

Each movement into or through a narrow space counts as if it were 2 squares, and while squeezed in a narrow space, you take a -4 penalty on your attack rolls and a -4 penalty to your Armor Class .