Sharpening stone SHUN 1000/4000 21 cm, KAI

Product detailed description

The KAI DM-0400 sharpening stone is one of those products that look inconspicuous, but very quickly reveal who at home really takes knives seriously. An average person sees a flat sharpening tool. An enthusiast sees another opportunity to spend half an hour in complete concentration and then force paper on everyone in the household for a demonstration cut.

Main advantages:

• The KAI SHUN DM-0400 is a combination water sharpening stone with two grit sizes, which allows you to restore the cutting edge on a single tool and then finish it more finely.
• The #1000 grit side is designed for basic sharpening and restoring the knife's sharpness when fine touch-ups are no longer enough.
• The finer #4000 grit side follows the first sharpening stage and is used to smooth and more precisely finish the cutting edge.
• The combination of #1000 and #4000 is practical for the regular maintenance of quality kitchen knives, as it combines two consecutive sharpening stages in a single stone.
• The DM-0400 belongs to the KAI SHUN accessory range and is designed as a classic water sharpening stone for manual sharpening, giving you full control over both the angle and pressure on the blade.
• Before use, the stone is soaked in water until air bubbles stop rising, and during sharpening, it is necessary to keep its surface constantly wet.
• During sharpening, water helps create the necessary working environment on the surface of the stone while simultaneously washing away particles generated during the edge treatment.
• During sharpening, the knife is guided back and forth along the entire length of the stone, ensuring the sharpening surface is used evenly and the cutting edge is worked along its entire length.
• KAI recommends not applying excessive pressure during work - the blade is guided over the stone in a controlled manner, and the pressure should approximately correspond to the light weight of your hand.
• For double-beveled knives, the blade is held at an angle of approximately 15° to the surface of the stone, with the key being to maintain this angle as consistently as possible throughout the entire stroke.
• When guiding the knife along the stone, KAI recommends orienting the cutting edge at an angle of approximately 45 to 60° relative to the longitudinal axis of the sharpening stone.
• Once a fine burr forms on one side of the edge during sharpening, proceed in the same manner on the other side until a burr forms there as well.
• The DM-0400 can also be used for single-beveled Japanese knives; however, the way they are applied to the sharpening stone differs from standard symmetrically ground blades.
• The dimensions of the stone (21 × 7 × 3 cm) provide a sufficiently long and wide working surface even for the comfortable sharpening of larger kitchen knives.
• The design includes a black base, which separates the sharpening stone from the work surface during use and helps create a more practical working setup.
• During sharpening, it is important that the stone does not slip; KAI therefore recommends using a suitable holder or another stable non-slip mat.
• The DM-0400 is particularly suitable for situations where you want to have full control over the sharpening process and, after restoring the edge on the #1000 grit, proceed directly to a finer finish on the #4000.
• KAI does not treat blades as just another catalogue item – for over a century, they have been developing expertise around cutting edges, and alongside the knives themselves, they offer specialised equipment for their sharpening and long-term maintenance.

Additional information:

• dimensions: 21 x 7 x 3 cm
• material: ceramic-bonded abrasive
• with long-term use, the sharpening surface gradually wears down and may lose its flatness; a flattening stone is designed to level it, restoring the flat working surface needed for precise sharpening