Mining perks 3–4

Purchase unlocks a perk; activate it in a free slot to use its effect. Check the live card for its current level, price and XP bonus.

Tempered Grip
Use with this skill's relic tool to reduce its wear.
This protects relic tools, not ordinary tools.
It does not help items that never wear out.

Stonebinder
This bonus gives the listed extra XP while on.
Its only effect is extra XP.
Compare the current bonus and cost with your other unlocked bonuses.