Both during development and in the subsequent decision to adopt it by the 17th Stormo Incursori, high priority was given to offensive capability, handling, and efficiency The BD4 Contractor is equipped with a double-edged blade featuring partial serration and a double guard. The clip, mounted on the anodized Anticorodal aluminum handle, allows the knife to be attached to military gear and to the specific sheaths issued to special forces. The blade shape is designed to ensure effective cutting and penetration. BD4 Contractor is available in 2 versions: