This page is about Builder from RFTools. For other uses, see Builder.
The Builder is a machine added by RFTools. It consumes Redstone Flux (RF) to construct areas in the world with blocks fed into its inventory or relocating preexisting areas. There are three modes that the Builder can run under: Swap, Move, and Copy, the last of which requires blocks in its inventory. It can be used in conjunction with Space Chamber Corner Blocks and Space Chamber Controller Blocks to designate an area to be built in.