* The combination of a solid steel handle and flat faced 2cm wide x 7.5cm long abrasive surfaces, gives you the greatest control during sharpening. * The honing surfaces are made with 2 different levels of high quality diamond encrusted composite abrasive: * 30 microns (fine grade) on the front. * 60 microns (medium grade) on the back. * Mounted on a rigid, lightweight 2cm wide stainless steel handle, the stability of the handle and width of the abrasive surfaces makes this tool extremely effective and easy to use. The honing surfaces remain flat through out the lifetime of the Hook Stone, ensuring the product remains effective for longer.