Install Tinkers’ Construct for Minecraft 1.20.1
Open the Tinkers’ Construct book or use the Tinkers’ Station
Gather hammer parts:
Two large plates
One hammer head
One tough handle
One binding or other required part, depending on the version/addons
Make the parts in the Part Builder using the correct materials
Use a Tool Station or Tool Forge to assemble the hammer
Place the required parts into the hammer recipe slots
Confirm the craft to create the hammer
Repair or modify the hammer later at a Tool Station or Tool Forge