Tinkering
The ability to fashion tools for use with the other trades makes it a good starting point for any up-and-coming crafter. For example, it allows a miner to create more Shovels as he works. These tools often do not require high levels of skill to create, so not all crafters need to be Grand Master tinkerers to get an advantage - Though Exceptionally crafted tools do last longer. With enough skill, your characters may even assemble obedient Golems to do their bidding in battle. While not often used in real combat situations, their extreme poison resistance makes them prized by fighters wishing to train their combat skills. Usually Tinkers work with ingots, though on occasion they create items out of wood as well.
You will require a set of Tinker's Tools to practice your trade.
Training:
0-30: - Buy from NPC
30-40: - Hammer
40-45: - Shovels
45-85: - Lockpicks
85-108: - Spyglass & Heating Stands
108-120: - Fancy Wind Chimes