Stiletto be employed along with the dagger as a fighting weapon; a 1536 dueling treatise authored by Achille Marozzo, "Opera Nova", contains sections on dagger and stiletto fighting. By the time of the Renaissance, the term stiletto had come to describe a range of slender thrusting knives closely resembling the French poignard, many with conventional dagger-profile blades and sharpened edges, but always retaining the slim profile and needle-like point. To lighten the weapon, many stilettos were equipped with blades carrying fullers over a portion of their length. The stiletto remained a popular weapon of criminals or political assassins from the 16th
Heel (corporation) homeopathic preparations available through Heel GmbH. When Reckeweg relocated to Albuquerque he created Biological Homeopathic Industries (BHI) and began manufacturing combination remedies in tablet form. In 1997, the Albuquerque company was renamed Heel USA Inc. In 2014, Heel USA became independent from the German Heel organization and operates under the name MediNatura Inc, which now manufactures and distributes BHI products and is the only legal importer of Heel products in the USA. In 1984 BHI received letters and warnings from the Food and Drug Administration that it was in violation of FDA regulations in regards to marketing of homeopathic remedies.