WikiHouse enables users to download Creative Commons-licensed files from its online library, customize them using SketchUp, and then use them to create jigsaw puzzle-like pieces out of plywood with a CNC router.[1][7] Construction of WikiHouse structures requires no special parts because the cut pieces of wood snap together with wedge and peg connections inspired by classical Korean architecture.[11][12] The frame of a WikiHouse can be assembled in less than a day by people with no formal training in construction.[11] The frame must then be finished with cladding, insulation, wiring, and plumbing before it can be inhabited.[2][12] The WikiHouse project is maintained by Open Systems Lab.[13]