This diamond whetstone is the largest offered by James Barry Sharpening. It is the most versatile of all three of the sizes offered as the proportions of the stone enable to to be suitable for sharoening anything from the smallest carving chisel to and axe head.
You are purchasing:
1 x 8" by 3" Monocrystalline Diamond Whetstone
James Barry developed his diamond whetstones to be of the highest quality. They are monocrystalline - which are far superior to their cheaper, polycrstalline counterparts; and they are electroplated to their base block (which is produced to be as flat as possible) instead of being impregnated/glued on.
Both of these considerations give these diamond whetstones an enormous longevity advangate over cheaper alternatives. If you look after your stone it should last you a lifetime.
These diamond whetstones come with a 5 year guarantee as standard as long as they are used with lapping fluid to lubricate the chisels being sharpened, and not oil or water.