Mighty Mac is a double-ended Fairlie locomotive.
- Mighty Mac with Green Narrow Gauge Coach (Motor Road and Rail, TrackMaster [Tomy; UK only])
- Mighty Mac with Green Narrow Gauge Coaches (Plarail)
- Mighty Mac with Green Narrow Gauge Coach and Troublesome Truck (TrackMaster [HiT Toy Company])
- Mighty Mac has no room for his motor due to his spinning feature, so they are driven by a Green Narrow Gauge Coach.
- Mighty Mac's body can be turned around so either one of them can face their coach.
- The Motor Road and Rail Mighty Mac in the US could only be found in the Thomas Ultimate Set.
- Mighty Mac (along with Molly)'s models lack side rods even though they have side rods in the TV series.