To protect the blade from scratches

Venev Diamonds may have the flatness tolerance up to 0

If you a not sure which sharpener you have

Bonded diamonds are universal and able to sharpen any steel

llyn idwal stone edge pro To protect the blade fromLlyn Idwal sharpening stones are used for ultra fine sharpening knives on Hapstone and Edge Pro sharpeners. Estimated grit for the stone is 8000 JIS. Llyn Idwal stones are mounted on high quality aluminum blanks. Llyn Idwal Whetstone was mined in Llyn Idwal region, North Wales, in the United Kingdom. Llyn Idwal is preliminarily lapped and does not require lapping after purchase. Llyn Idwal stones should be used with one of these lubricants: Refined