Set 5 includes all the parts in Set 4 and much more. Set 5 comes in a 2 sided hardwood storage case. Everything packs away at the end of he class allowing a parts count. Set 5 features attachments which allow the Set 4/Set 5 matrix base to be mounted vertically. Extension torque bars allow mechanical action to take place outside of the matrix board. Set 5 features a wooden parts tray to keep all small pieces in order.