Formsprag Clutch, Marland Clutch and Stieber Clutch are recognized globally as the industry-leaders in overrunning clutch and backstop technologies. These Altra brands provide high-quality, robust solutions that exceed industry performance requirements for maximizing operational up time. Altra overrunning clutch solutions are hard at work protecting costly drivetrains while preventing injury and lost production time in several key markets including mining, metals, oil & gas, food processing, packaging and aerospace & defense.