The Multi-Jackbolt Tensioners make large-diameter bolting safer for workers, reduces installation and removal times, and requires only hand/air tools. The DVD, “The Simple Solution to Bolting Problems,” explains the technology in detail, compares this bolting method to others, and covers common applications in a wide variety of industries. Superbolt Inc., Box 683, 1000 Gregg St., Carnegie, PA 15106, (800) 345-2658, www.superbolt.com