Pillar checkering files are 1/2" wide, parallel in width, and gently tapered in thickness.
Overcut is parallel to file edges and upcut is 90° to overcut
Double cut top and bottom
Both side edges are safe (no teeth)
Useful for putting serrations on knife edges and plier jaws, or to create a checkered design on a gun grip
ALWAYS WEAR EYE PROTECTION WHEN USING A CHECKERING FILE