The TB-CD600 boasts a punch capacity of up to 25 sheets (20# paper) at once using its forward pushing dies. Electric machines with vertically pressing dies have to fight against gravity to release its dies from the paper, but this forward pushing electric machine runs parallel to the tabletop, lengthening the life of its motor. The TB-CD600 is an excellent addition to any school, office, or print shop environment. This binding machine utilizes 19-ring plastic binding combs and binds documents up to 2" thick.