Kershaw's Auto-Tek Blade Sharpener is the perfect little tool for honing your knives. Just grab this little beauty and push the button--out comes the sharpening steel, deployed and ready to put an edge on your knife. THe 600-grit diamond surface is great for honing and sharpening. Push the trigger to deploy the stone and pull it back to retract it. Comfortable to hold and great for your pack or gear bag, the Auto-Tek is the perfect sharpening companion to keep your knives sharp. Steel: 600-grit diamond-impregnated steel Handle: Double injection-molded Santoprene®, black & gray Blade Length: 3-1/8 in. (7.9 cm) Closed Length: 4-1/2 in. (11.3 cm) Overall Length: 8 in. (20.3 cm) Weight: 3.4 oz.