Hauler is an accessory company based in the Czech Republic that produces high quality photo-etched sets for AFVs, airplanes, cars, railway vehicles, and resin accessories for dioramas and resin kits.
Before we go into the product here is a brief explanation of what “Dragons teeth” are. Dragon's teeth are square-pyramidal fortifications of reinforced concrete first used during the Second World War to impede the movement of tanks and mechanized infantry. The idea was to slow down and channel tanks into killing zones where they could easily be disposed of by anti-tank weapons.
In practice, the use of combat engineers and specialist clearance vehicles enabled them to be disposed of relatively quickly, and they proved far less of an obstacle than many had expected. The obstacles could also simply be buried using bulldozers and dump trucks.