It is recommended that you use a new world with this mod, as it generates some new stuff that can be very helpful, however it is not necessary. The main feature of the mod is that it allows you to put tools and weapons together in a whole bunch of ways, and then modifying them until they turn into something new and completely different. Tinkers Construct is a mod that adds a whole slew of new interesting features to the game, as well as a heap of new items, tools, weapons, and blocks!
