Is this a sledgehammer? If yes how do I use it?

[buoyant kraken]

right click on ground with it in inventory, select "destroy" and move red square to thing you want to destroy

[runic zinc]

1: Don't know.
2: Right click on a structure you want to destroy. If one of the options is "Destroy" then yes.

Seem more likely that will work to break open house doors. MAYBE windows and car doors as well. Try reading the mod description.

[buoyant kraken]

I believe this means it's a regular sledgehammer, otherwise the mod maker is misleading the user lol

[runic zinc]

Agreed. But who knows. Seems odd to have mods without knowing how destroying things works.

[robust hatch]

Wait so this is a sledgehammer?

[robust hatch]

I just started project zomboid after watching a yt vid

And just downloaded most his mods