Gatco Double Duty Sharpener features a ceramic and carbide sharpening preset sharpening angle for easy use polymer housing with slip resistant rubber grip pads. The knife sharpener is compact and light weight fast safe and easy to use. The carbide sharpening bits restores edge fast ceramic sharpening rods for finished edges ceramic sharpens serrations key ring hole. *Do not pull knife through the center as it will damage the sharpener.