Patent ID: 7503242

Claim:
A method for manufacturing a wrench handle, the method comprising: preheating a work piece made of metal, with a layer of carbon scale being generated on the work piece during preheating; forging the work piece after preheating to form a wrench handle having at least one end for driving fasteners, with the carbon scale on the work piece being forged into a surface of the wrench handle during forging; removing the carbon scale after forging and leaving a pitted area with a plurality of pits in the surface of the wrench handle, with each of the plurality of pits having a depth from the surface of the wrench handle; and providing a concealment treatment by pressing the pitted area of the surface of the wrench handle inward to a pressing depth after removing the carbon scale after forging and forming an indentation section on the surface of the wrench handle for covering the plurality of pits, with the indentation section including a first level area having a first depth to the surface of the wrench handle after pressing, the indentation section further including a second level area located at a position different from that of the first level area and having a second depth to the surface of the wrench handle after pressing, with the second depth being larger than the first depth, and with the depth from the surface after pressing of each of said plurality of pits being larger than the first depth and smaller than the second depth.