A cutting tool, particularly for steel sheet billets, having a cutting blade fastened to a blade holder and a pressure cushion which is arranged on sides of the blade holder and, when the cutting blade penetrates into the material to be punched, is pressed onto the latter in the area of the useful punched part. The coating film according to the present invention has excellent abrasion resistance and contamination resistance such as fingerprint trace removability and scribbling resistance. A safety device for the dummy bar has an element that can be engaged, with form fit, with the dummy bar and limiting the speed of the cold bar. Thereafter, if required, the hydrogen enhanced methanehydrogen gas blend is dehydrated to remove a sufficient amount of water to provide a flame stable hydrogen enhanced dehydrated methanehydrogen gas blend. An available time interval based on the monitoring time interval and the unavailable time interval is determined. By an operation of only irradiating a first lens with parallel light which has an intensity distribution corresponding to the shape of a second lens and irradiating an ultraviolet curing resin layer with transmission light, the first and second lenses are placed with a high alignment accuracy in a mutual positional relation thereof.