It is are made of a hardened alloy that sharpens virtually all blade steels you will encounter.

It has three holes and two positions
- The End Holes are for knives and smaller blades.
(Use either end of the insert to get the most use.)
- The Middle Hole is for tools.
(Extend the insert to the middle hole to sharpen tools.)

The insert is adjustable, and can be extended to the middle hole for tool sharpening.

Freshen the insert if the sharpener doesn't seem to be cutting like it used to,
- Loosen the screw
- Rap it sharply with pliers to loosen the insert
- Pull it a tiny bit to get a new spot.
