Last weekend at the very early start of E3, Bethesda revealed Fallout 4 players will be able to enjoy some new workshops, one of which allows players to build their own Vault, as well as a trip to Nuka World. The first of the next three expansions, called Contraptions Workshop, will be deployed this week, and Bethesda has revealed when exactly it’ll become available.

Fallout 4 players will be able to tinker around with the Contraptions Workshop starting as early as 12am ET in North America. Players across European territories will get their chance to tinker with the expansion starting at 12am local time.

Contraptions Workshop is the fourth expansion for Fallout 4, and the second workshop-based expansion for the title. The expansion allows players the ability to create a number of new items for their ever-growing settlements, including an elevator, armor and weapon racks, sorting machines, track kits, and more.