Expert Tinkerer Feat

Your long experience with tinkering has granted you the following benefits:

Prerequisite: Proficiency with tinker's tools

• Your Intelligence ability score increases by 1, to a maximum of 20.
• When you make a Tinkering crafting check, you can take 10 as the result of the d20 (instead of rolling) without spending additional time.
• During a long rest, you can produce two pieces of Advanced Ammunition worth less than a total of 50gp without material components beyond pieces of ammunition. This piece of ammunition is of temporary construction, and becomes a normal piece of ammunition after 24 hours.

Source: KCCC, page 124