Shoot-N-C 8" Sight In and Specialty Target (15 Per Pack) There are two pre-set knife sharpening angles in the wood block 20 degree & 25 degree 25 Degrees - This is used for most kitchen knives and provides a sharp, durable edge. 20 Degrees - This is used for those desiring a very sharp edge. Some examples would be for filet knives or cutting tomatoes. Lower degrees result in sharper knives, but require more regular maintenance. This 2-Stage Knife Sharpening System features a hardwood turnbox with internal rod storage in the base. Includes four 5" long alumina ceramic rods. (2 medium grit, 2 fine grit).