Extra Coar se Sharpening Hone Lansky A great accessory for a extreme knife user's Lansky Sharpening System. This 70 grit Alumina-Oxide Hone lets you reshape and repair heavily chipped and damaged edges. Key Features extra coarse alumina-oxide hone 70 Grit threaded brass insert for stainless steel screw ergonomic plastic housing made in the USA intended for use with the Lansky Controlled Angle Sharpening Kits Instructions Insert the guide rod into the hone. Make sure the rod is in line with the sharpening surface. Bend the rod slightly, if needed. Set the angle to the same one pre-established on your knife. Sharpen away!