Extra Tool Variants Mod adds a 6 tools to the game, which can be placed within the Ender IO Farming Station (or used by hand, however are most convenient within the latter use-case), one set of 3 have a higher durability than Diamond, being 1750 (as apposed to 1357) and the other (the tools of Power) have an infinite number of uses. However, this requires fighting the Wither, a number of times!
The mod is included within the GangPack 2.0 download, hence there is not currently an extra download available.
Click here for the changelog.
All beta testing must be completed within the GangPack 2.0 modpack, more information about the pack can be found here; [External-site] GangPack 2.0