There are two pre-set knife sharpening angles in the wood block 20 degree and 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
This 2-Stage Knife Sharpening System features a hardwood turnbox with internal rod storage in the base, and four 5" long alumina ceramic rods. (2 medium grit grey rods, 2 fine grit white rods)