This Extra Fine grade DMT 150mm Diamond Whetstone features a 1200 grit, 9 micron surface, identified by its distinctive green dual-coloured circle. The extra fine grade is specifically engineered for final polishing and honing, creating razor-sharp, mirror-finished edges on precision cutting tools. This variant is essential for craftsmen requiring the ultimate edge refinement on chisels, plane irons, carving tools and surgical-grade instruments. The precision monocrystalline diamond construction ensures consistent, scratch-free polishing that traditional stones cannot match. Its continuous surface design provides uniform contact across the entire blade edge, whilst the non-slip rubber feet and included non-skid mat guarantee stability during delicate finishing work. Water lubrication maintains a clean working surface without the contamination risk of oils. The grit specification is permanently etched into the side, with the green identification circle enabling instant selection from yo