Tool Expert Feat

You have honed your proficiency with particular tools, granting you the following benefits:

Prerequisite: None

• Increase one ability score of your choice by 1, to a maximum of 20.
• You gain proficiency with one tool of your choice.
• Choose one tool in which you have proficiency. You gain expertise with that tool, which means your proficiency bonus is doubled for any ability check you make with it.

Source: KCCC, page 125