שמואל א יג:כא פירוש: רש״י

There was a multi-edged file that was used for the tools. For those who found it troublesome to go down to the Philistines to sharpen, had the פְּצִירָה פִים, lime in O.F., which has many mouths, i.e. many sharp and jagged surfaces to sharpen the tools and mattocks.

Three pronged pitchforks. A fork similar to a pitchfork, which is called 'forche' [in O.F.], having three prongs.

And for setting the yoke. To sharpen the tip, and to insert it and set it into the handle.