This paper introduces a special tool for removing the twist drill (hereinafter referred to as "drilling tool"), which can quickly remove the drill bit broken inside the workpiece. First, the structural characteristics shown in Figure 1, the drilling tool consists of two parts: the rotating body and the magnet. Wherein, the rotating body is an integral part synthesized by a ring and four chips such as a twist drill, and the column is sharpened or the whole drill is used with a strong magnetic force.
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