Abstract: A cutting tool includes: a base metal provided with a seat portion; a blade edge member that is a polycrystalline diamond sintered material containing polycrystalline diamond and a binder; and a brazing material that fixes the blade edge member to the seat portion of the base metal. The blade edge member has a thickness of greater than or equal to 0.3 mm. The brazing material is disposed between a blade edge bottom face of the blade edge member and a seat bottom face of the seat portion and is in contact with the blade edge bottom face and the seat bottom face. The flank face is located outside of the base metal with respect to the lateral face of the base metal.

Abstract: Disclosed is a plate type of heating device for melting solid oils comprising a sheathed heater, a plate-like metal covering for enclosing the major part of the sheathed heater in thermal conducting relation with the metal covering, an external cladding body joining with the opposite ends of the sheathed heater, a handle integrally connected to the external cladding body and a connector for connecting the sheathed heater to an electric power source through the external cladding body.