Tinkers' Construct is a weapon and tool manufacturing mod. It introduces different ways of crafting harder, better, faster and stronger equipment. The mod adds Patterns for tool and weapon parts that allow the player to create hundreds of combinations; each with their own strengths, weaknesses, and effects. After the tool or weapon is created, additional materials may be installed to boost the item's abilities, or to simulate vanilla enchantments. It introduces a multi-block structure called the Smeltery, which is used to craft metal tools/parts and some decorative blocks, as well as providing a method of doubling ore output.
Tinkers' Construct also introduces a new inventory tab, called Armor Tab, which removes the 2x2 crafting grid and provides brand new equipment slots for various apparel, including one for Knapsack, which further expands available player inventory slots.