This is an authentic whetstone used for sharpening gyuto knives, which are used to cut meat and bones at butcher shops. This is a set of two stones: a coarse stone and a finishing stone. Both have chipped corners, and the finishing stone has a deep gouge. While there is no problem with using them to sharpen blades, I do not recommend them to those who are concerned about this. These have been used for many years in the field, so please consider purchasing them if you understand that they are used items. We hope you will find them useful for maintaining knives used in professional settings such as fresh fish and meat shops, and restaurants. Just as practical training is important in martial arts, equipment is also meaningless if it cannot be used in actual work. These are practical items that were used in professional settings. Coarse Stone: Total length approx. 20.5cm, height approx. 2.4cm, width approx. 7.6cm Finishing Stone: Total length approx. 20.5cm, height approx. 3.2cm, width approx. 7.7cm Total weight of two stones: approx. 1.8kg (Please note that there may be some errors due to amateur measurements) ★★ No 10% consumption tax ◇ Free shipping! ★★ 〷〷 We do not offer individual price reductions 〷〷 #NaturalWhetstone #Aoto #CoarseWhetstone #FinishingWhetstone #Knife #BladeSharpening