can the waste drill be a lettering tool (what is the scrap drill is used to do)

使刀头部分呈麻花钻头形，然后通过刻字机控制该刀具旋转实现在模具有刻字基于上述刀头的结构，使刀具的直径普遍较大，市场上最小刀具的直...