King Bench Waterstones - Coarse 300 Grit 300 Grit, Size: 207x66x34mm
King is the major producer of manufactured ceramic waterstones in Japan and for good reason & they produce the best low-cost manufactured stones in the country and generally regarded as the industry-standard waterstone, not only in Japan but also Australia.
The 300grit stone can be used for reshaping tools and/or for use on coarse steels like gardening tools etc..
These stones should be stored in water when not being used.