The Tiger 2000S runs slowly in a water trough so that the tool never looses its temper due to overheating, along with the special stone containing grains of aluminium oxide, you achieve perfect grinding results quickly The grinding stone is also ideal for HSS tools, whilst the leather honing wheel removes the burr & gives a perfectly polished cutting edge. It is removable to allow unhindered access to the grindstone when grinding long knives or tools.