156N Dual-Grit Diamond Whetstone with Storage Base 6'' x 2.5'' / 152 x 63 mm Coarse / Extra Fine

The sharpening surface uses industrial monocrystalline diamond electroplated in nickel onto a stainless-steel base.

SHARPAL 156N is manufactured with MirrorFlat® technology for consistent, even contact during sharpening, with precision flatness of ±0.002" / 0.05 mm.

Water or oil is not required. Dry sharpening is recommended. Testing shows minimal difference in sharpening performance between dry use and using fluid. If any liquid is used, clean and dry the stone thoroughly after sharpening.

The stainless-steel base itself is corrosion-resistant, but metal filings left on the surface can oxidize and appear as rust or yellow discoloration. Clean the surface after use and store the stone in a dry place.

Wipe the surface with a dry paper towel. If metal particles are clogged on the surface, use a rubber eraser or a soft nylon brush. For tougher stains or discoloration, Bar Keepers Friend powder can be used with a soft nylon brush, followed by thorough rinsing and complete drying.

No. Dark areas are usually dried sharpening residue or metal particles, not missing diamonds. These marks do not affect sharpening performance.

Yes. Light scratches or dark marks are normal signs of use and do not mean the diamond layer has worn off. They do not affect sharpening performance.

Yes. A new diamond sharpener may feel especially rough at first due to the final manufacturing process. The surface will smooth out with use, and this does not negatively affect performance.

No. Use light pressure. Excessive pressure can accelerate wear on the diamond surface and shorten the product’s lifespan.

Lifespan depends on sharpening frequency, the hardness of the tools being sharpened, the pressure used, and maintenance. With proper care, light pressure, and regular cleaning, it can last for many years.

These marks are usually caused by metal filings left on the surface that oxidize after sharpening, especially after sharpening non-stainless steel blades. The marks are not rust from the diamond stone itself.

Yes.
Small pits on the shorter sides can be caused by clamps used during the electroplating process. They are not defects and do not mean the product was used.

Not necessarily. Black marks on the edges may be caused by friction with the plastic holder or case during transport. This does not indicate diamond abrasive loss and does not affect sharpening performance.

Yes. The plastic protrusions may be pre-fitted at the factory so the diamond plate can fit securely into the holder. This helps reduce instability during sharpening.

The 325 grit diamond side can flatten sharpening stones, but frequent flattening is not recommended because this product is designed primarily as a sharpening stone, not a dedicated flattening stone.

Choose 162N 8" x 3" if you want a larger working surface, faster sharpening, and easier angle control, especially for knives 8 inches or longer and larger tools. Choose 156N 6" x 2.5" if you prefer a more compact size for smaller knives, pocket knives, portability, or limited storage space.

For high-value professional hair-cutting scissors, professional sharpening is recommended. For lower-value scissors, SHARPAL 156N can be used, but sharpening scissors well requires practice and proper angle control.