The Formax FD-668 is a medium-volume forms burster is capable of bursting forms with up to 4 parts at a speed of up to 350 feet per minute.  Included slitters can trim margins up to 3/4 inches.  The FD-668 features a base for added storage and height.  Users with high volume will often run a Merger in-line with the burster to allow "two-up" processing. Two-up processing increases the output volume two-fold by taking a continuous business form printed two-up or side-by-side, slitting the two forms in the middle and feeding them into the burster in staggered format to come out of the machine in one neat and orderly stack.