What pen is used for first-class hard pen calligraphy?

They are pens, gel pens, artistic pens, pencils, chalk and so on. Hard pen calligraphy uses pens, gel pens, art pens, pencils, chalk, etc. , is a bright pearl in the hundred gardens of calligraphy art. With ink or powdery medium as the main carrier, the writing skills of Chinese characters and other characters are expressed. It has the characteristics of convenient carrying, quick writing and wide use value. The visual difference between it and brush calligraphy is that the strokes are thick or thin, just like removing their bones and muscles.