A blade or punch assembly for double-ended nibbler tools which affords easier removal by in part providing a blade having central portions of a single diameter equal to or slightly less than the composite bore through which it is adapted to extend. The air blanket reflector has a relatively thin metal plate, such as 14 gauge stainless steel, facing the interior of the tank and an air-filled cavity on the opposite side of the thin metal plate. The alternating raised and depressed areas provide the material with a coefficient of friction that compares well to standard drape materials that include a non-woven layer. The steamer apparatus is comprised of two unfastened pieces, a basket and a support base, each of which has a plurality of small holes through which steam, but not food product, may pass. A drive assembly is positioned within the housing.