Metal pick, customize damage and durability

I want to create a new metal pick and i want to customize damage and durability. What i need to edit and where?

Thx for help

Check out https://www.youtube.com/watch?v=kxoWB2wegDU&list=PL1kfMnmDe3Y6fGPeiIocKbU4PCTs53fjO&index=3

Instead of the pick he use, search for metal pick and do the same as he do…