The SureSharp and Scissor sharpener is fully adjustable to suit all manner of types, from acutely ground filleting knives right the way up to cleavers and sports knives. The 2-stage mechanism re-edges blunt knives and hones your knives to keep them sharp. Simply turn the knob to dial in the desired grinding angle from 14° to 24°. If the existing edge angle is unknown, refer to the suggested angles printed on the back of the sharpener. Also includes a very useful scissor sharpening slot. Simply insert the through the slot as far as theyll go, as if you are trying to snip the ceramic rod. Pull the through while at the same time closing them around the rod. Keep the sides of the blades flat against the vertical plastic guides for best results. Left-handed can be sharpened from the rear of the sharpener. 10 Year Guarantee This product cannot be sold to any person under the age of 18.