This 18x6.5x3cm dual-sided whetstone lets you sharpen your commonly-used metal kitchen knives (excluding serrated knives) with professional results. Dual-sided whetstone features 400 coarse grit side for initial sharpening and 1000 fine grit side for fine tuning, polishing and finishing your blade and the non-slip base attaches to whetstone to keep it safely on benchtop when in use. MasterPro is a professional grade kitchenware brand designed for superior function, durability and style. With a continually expanding product selection covering everything from food preparation to kitchen storage solutions, MasterPro is your all-encompassing kitchenware specialist.