RollSharp™ is the smartest method for honing your knives. It boasts exceptional intuitiveness, yielding rapid results. Simply affix any metal knife to the magnetic knife sharpening block and employ the RollSharp™ sharpener to refine the edge of your household or kitchen knives by smoothly gliding it along the blade.

RollSharp is compatible with a wide range of knives, including kitchen knives, cleavers, most smooth-edged hunting knives, and folding knives with a smooth edge. Blades that are not suitable for sharpening with RollSharp are those found on bread knives and scissors.

Knives crafted from Damascus steel possess exceptionally high hardness, often raising questions about the optimal method for re-sharpening such hard blades. RollSharp features a high-efficiency diamond wheel, a material harder than Damascus steel. As a result, even these exquisite knives can be effectively sharpened with RollSharp. Furthermore, the consistent 18, 15, 20 or 22 degree angle ensures that only the cutting edge is honed, preventing damage to the expensive blade.

Ceramic is not magnetic, which means knives with ceramic blades cannot be secured onto the magnetic holder. Consequently, RollSharp is not suitable for ceramic knives.

Yes, this is achievable. Japanese knives are often single-beveled, requiring sharpening on one side only. With the RollSharp magnetic holder, you can select between 15, 18, 20 and 22 degree sharpening angles. This allows you to alternate sharpening from both sides and, consequently, sharpen only one side of the blade.

The initial step involves sharpening at a consistent angle of either 15 or 20 degrees for the first time. Most knives come from the factory with an angle ranging between 15 and 20 degrees, although it may not always be uniform. The first sharpening session typically lasts between 2 to 6 minutes, and for specialty blades with high hardness, such as Damascus steel, it can take up to 10 minutes. Subsequent uses, after the knife has slightly dulled, require only a few forward and backward strokes as the grinding angle has already been established during the initial sharpening.

Diamond is the hardest material on Earth and is considered the most durable sharpening material for high-quality kitchen knife steels. When RollSharp is used correctly, you won't need to replace it very often. We do offer replacement sharpening disks that can be easily interchanged with all RollSharp Knife Sharpeners.

The RollSharp roller grinder is not suitable for serrated knives. It can grind away the serrations on the blades of bread knives and may damage the surface of the diamond sharpening disc wheel.

For taller knives, such as a large Chinese chef's knife, the RollSharp Sharpener can be placed on top of a Cutting Board to elevate the grinder to the level of the cutting edge.

A 20-degree angle is a more robust angle compared to the steeper 15-degree cutting angle, which may provide greater precision. Before you consider adjusting your knives, it's essential to keep the following points in mind:

Western knives are typically crafted from a softer variety of steel, which is more forgiving for the high-impact cutting styles commonly used in the West. This softer steel may not hold a narrower 15-degree angle for an extended period, leading to the need for more frequent sharpening. In contrast, Japanese knives are constructed from a harder, more brittle steel that can maintain a narrower edge for a longer duration.

Additionally, when you alter the angle from 20 degrees to 15 degrees, you will inevitably remove a significant amount of metal from your knife over time.

The industrial diamonds employed by RollSharp are the ideal material for restoring knife blades of any hardness to an optimal basic sharpness. In the initial step, using the coarse diamond grinding wheel, you sharpen your knives, yielding a highly satisfactory grinding outcome. Following the coarse sharpening with the diamond disc, the cutting edge undergoes a fine finishing touch with the stainless steel honing wheel, effectively smoothing out the last burr on the cutting edge. Here, only a few forward and backward movements are required to achieve the desired result