Versatile Crafter (3.5e Feat)
From D&D Wiki
You have become skilled in seeing and using similarities among different Crafts.
Prerequisite: 10 ranks in any two Craft skills.
Benefit: Choose a number of Craft skills, Equal to your Intelligence Modifier (minimum 1). When making craft checks with any of these skills, they are treated as you had ranks in them equal to half your highest Craft skill (Rounded down).