Hey!

I've modified the standard mining levels for a few blocks with the mod Tool Progression, and the Sledge Hammer is unable to mine anything that can't be mined by hand, even though its' harvest level is higher than needed.
It appears that the Sledge Hammer's mining level is always 0.

TinkersComplement-1.12.1-0.2.2b

I don't control the mining logic of the sledge hammer, that is all done by Ex Nihilo. Try it with there hammers and see of you get the same behavior.

I see, the issue must be with Tool Progression, as Ex Nihilo hammers work as intended.

Sorry about the inconvinience.

It was indeed Tool Progression, it doesn't recognize the Sledge Hammer as a Tinkers tool.