how the mod works:

craft the Tool Leveling Table
put an enchantable item in the big middle slot
place enough Enchanted Books in the left slots (by default at least 4 books)
bookshelfs around the table increase the chance of success
special items in the right slots will result in more and higher level enchantments
press "Upgrade"

Recipe

The enchantment added to the tool will be picked from the books in the left slots.

Tool Leveling Gui

for more information about previous versions of the mod, check out the Github Wiki

if you have any questions about the mod, or you want a few insights about upcoming features:
feel free to join the Discord

link

Tool Leveling+

External resources