Two (2) hedgerow cutters (Type II version, according to Mr. Steve Zaloga's nomenclature)
Culin Devices, also known as Culin Hedgerow Devices, Rhino Prong, Culin Hedgerow Cutter or Rhinoceros.
References (click on the image to visit site):
Gently trim the excess resin and apply a bit of heat (using an hair drier, for example), to correct any distortion if need be.
You can use Vallejo 875 Beige Brown over a black undercoat to achieve the rusty look, taking in account these devices were built from the steel beams of the beach obstacles found in Normandy, for example.