M Line Holdings, Inc. engages in refurbishment and sale of pre-owned CNC (computer numerically controlled) machine tool equipment, services, and rebuilds CNC equipment, aircraft and medical precision metal component build-to-print and assembly services for production and spare parts through its subsidiaries. It operates through the Machine Sales and Precision Engineering segments. The company was founded on September 24, 1997 and is headquartered in Costa Mesa, CA.