Boeing partnered with the U.S. Department of Energy’s Oak Ridge National Laboratory (ORNL) to create a tool used to build the folding wing tip for the forthcoming 777X airplane. The wing trim and drill tool is now the world’s “largest solid 3-D printed item,” certified by Guinness World Records. The tool represents Boeing’s latest achievement in 3-D printing, also known as additive manufacturing. The tool is used to secure the 777X composite wing skin for drilling and machining at Boeing’s new St. Louis Composite Center of Excellence, where Boeing is designing and fabricating wing edge and empennage parts for the 777X.