I'm selling these whetstones to organize my collection, as I've accumulated quite a few for work. These are natural whetstones from Kyoto, for finishing. The five surfaces other than the sharpening surface have been protected. I think they're also good for sharpening plane blades, chisels, etc. If you take your time and sharpen carefully, you'll get a blade that cuts very well. The size is approximately 210mm x 75mm. The thickness is thin, approximately 7mm to 8mm. #naturalwhetstone #naturalwhetstone #finishing #diy #carpentrytools #plane #chisel #kyotoproduce #koppa (small piece/chip) #kitchenknife