锉刀是手工工具的一种，一般具有一面或多面尖硬的棱角，用来修整与清除毛边等功用。

考古学家最早在埃及发现以青铜制造之锉刀，大约铸造于公元前1200至前1000年间。

后来，在亚叙尼亚（今叙利亚）也发现前700年左右用铁铸造的形状类似锉刀的工具。

A file is a metalworking, woodworking and plastic working tool used to cut fine amounts of material from a work piece. It most commonly refers to the hand tool style, which takes the form of a steel bar with a case hardened surface and a series of sharp, parallel teeth. Most files have a narrow, pointed tang at one end to which a handle can be fitted.