Snap-on Industrial Brands, historically J.H. Williams Tool Group, is a division of American hand tool manufacturer Snap-on that makes and distributes tools to industrial markets. In addition to the Williams brand from which it originated, the group includes Bahco and CDI Torque Products. All tools are professional quality, made of high-grade chrome vanadium steel. Sockets feature SUPERTORQUE™ lobular openings for greater turning power without deforming the fastener Packed in rugged high-density polyethylene (HDPE) cases that are strong and durable yet light in weight. Case is shock proof at both high and low temperatures, equipped with heavy-duty metal latches and hinges. Two-component handles are easy to grip and comfortable to carry.