Firms with significant capital resources have no interest in it, and those without can't afford to get into it. Yet the industry's products are essential to virtually every other industry, including aerospace, automotive, machine tool, construction, electronics, metals, and furniture.
有人說螺絲是個尷尬產業，大資本看不上，小資本又進不來，卻是各產業不可或缺的零組件，從航太、汽車、機械設備、建築、電子、金屬、家具… …，幾乎無處不在。