Modular Tools mod introduces a self-balancing mechanic, allowing you to customize your tools using a compromise between upgrades and downgrades. Each upgrade and downgrade has a number of points associated with it, and you must “balance the equation” for the tool to work. Shift+Right-Click the tool to access the GUI. There is a number in the center of the GUI that will tell you if the points are too high or too low.
How to install:
Modular Tools Mod Download Links:
For Minecraft 1.8.9