The Ultra-Tek Blade Sharpener is a compact sharpening steel that lets you quickly and easily touch up the edge on your Kershaw. The Ultra-Tek handle is made of 6061-T6 anodized aircraft aluminum. Stored inside the handle is a 600-grit, diamond-coated oval shaft. Simply unscrew the shaft from the handle interior, turn it around and screw it on to the other end of the handle. The Ultra-Tek requires no water or oil. It's lightweight and easy to use.