Bonal International 

Bonal International, Inc., through its subsidiary, Bonal Technologies, Inc., provides sub-harmonic vibratory metal stress relief technology in the United States and internationally. The company's products include Meta-Lax stress reliving black magic distortion control equipment, as well as pulse puddle arc welding equipment. It also offers consulting, training, program design, and metal stress relief services to various industries, which include the automotive, aerospace, mining, petroleum, shipbuilding, welding, machine tooling, plastic molding, racing, engine building, armament, and die casting. The company was incorporated in 1990 and is headquartered in Royal Oak, Michigan.