Tetra's Modular Crafting allows the player to upgrade and customize tools and weapons using Modules. At any time you can turn a Workbench back into a crafting table simply by breaking it. It will lose it's crafting grid and will give access to the Tetra menu for modular crafting. Once you acquire you first Hammer, just hold it in your hand and right click ( RMB) on a regular crafting table to turn it into a Workbench.
( JEI is recommended to view crafting recipes) In order to create a Workbench, you need to craft a Hammer at a regular crafting table using two sticks, and two wooden planks (or stone) in a diagonal formation. The Workbench will allow you to customize and upgrade tools and weapons using various in game materials, as well as create specific tool types unique to the mod. The first step in exploring Tetra is to create your first Workbench.