Amati 801 - Politrafor Hot Wire Polystyrene Cutter (Expo 74360) 

The wire quickly heats up by pressing the trigger, enabling intricate shapes to be easily cut in expanded polystyrene.
Many uses such as: Shaping items for use as ballast in model boats, making letters & numbers for displays & cutting polystyrene for DIY use.
Maximum depth of cut: 20cm. Throat opening: 5cm.