Abstract: A wide band-width antenna, comprising a copper tube in a main structure, wherein the copper tube is closed at one end and is provided with a screw thread at the other end inside the copper tube so as to be connected with a feed-in terminal.

Abstract: A handle for hand tools includes a body and a plug. The body has a front end and a rear end, and a seating hole adapted to hold a hand tool is defined in the front end. An inner cavity is defined in the rear end, and two magnets are mounted in the inner cavity. A magnetizing space and a demagnetizing space are formed between the two magnets and one magnet and a surface of the inner cavity, respectively. The plug is attached to the rear end of the body, and a magnetizing hole corresponding to the magnetizing space and a demagnetizing hole corresponding to the demagnetizing space are defined in the plug. A slot adapted to turn a cup hook is defined in the plug and crosses the magnetizing and the demagnetizing holes. Consequently, the handle has multiple functions.