Make a blade
Bare, the bench makes the stone sword and the spine blade. Lay the materials on it, page to a design and strike. See Crafting at benches.
Better steel
The bench makes its own add-ons. The honing post opens the copper sword, the temper trough the iron sword and the plasma coil the plasma blade. Each one needs the one before it.
The vest
The leather vest is made here too. Press it to your chest to put it on.