This jaw set allows you to use TG GripSerts workholding grippers and Snap-in parallels on a Kurt 6” vise. Jaws are made from steel with nitride coating. Includes one pair of Snap-in parallels (41 mm, case hardened and precision ground), Torx T9 wrench, and 10-pack of screws. TG GripSerts grippers are sold separately.