The Global Straightening stone will help ensure your stone is completely flat. Use this straightening stone of course and medium (between 240 and 1000 grit) to even out the stone before starting the sharpening process.
Stone Dimensions: 205 x 53 x 26mm
Used to straighten/ flatten sharpening whetstones before sharpening.
Suitable for course/ medium stones between 240/1000 grit.