These Wrench furniture pieces were made by Japanese artist Iyo Hasegawa.They're made from threaded rods holding stacked offset wrenches, a tool whose form has captivated Hasegawa.Washers are used as spacers, and the pieces are fastened together with nuts.The main material used in the work, the offset wrenches, is not glued or welded and is not fixed in place, allowing the wrench to "twist" freely.