Step 1: Place the Bonlasharp Knife
Sharpener on a smooth surface.

Step 2: Select the sharpening angle: 15°, 18°, 20°, or 24°.

Step 3: Place the knife on the magnetic
holder with the blade touching the sharpening disk.

Step 4: Hold the roller and gently roll it
back and forth until the blade becomes sharp.

Step 5: Wipe the blade with a clean cloth
to ensure there is no residual abrasive debris.

Bonlasharp's #360, #600 Diamond Sharpening Discs make it easy to restore the sharpness of your knives. After initial sharpening with the diamond discs, use the #1000 Grinding Stone Disc and the #3000 Ceramic Disc for fine sharpening to achieve professional grade smoothness and sharpness.

The Bonlasharp is suitable for a wide range of knives, including:

15°: boning knives, fish filleting knives, slicing knives

18°: Santoku knives, Asian kitchen knives

20°: chef's knives, carving knives, paring knives,machetes, tactical knives

24°: Hunting knives, meat cleavers

Yes, the Bonlasharp's highly efficient diamond sharpening discs are harder than Damascus steel, making it easy to sharpen these delicate knives. At the same time, the fixed sharpening angle ensures that only the edge of the knife is sharpened without damaging the expensive blade.

The Bonlasharp is not suitable for ceramic knives as they are not magnetic and cannot be held in a magnetic holder.

For taller knives, such as large Chinese chef's knives, a cutting board can be placed under the Bonlasharp sharpener to bring the sharpener up to the height of the blade. Then roll it back and forth until the blade becomes sharp.

You need to turn the aluminum base over so that the knife is fixed to the base with the blade facing down, hold the roller and gently roll it back and forth until the blade becomes sharp. (Of course you can also place the base on a cutting board if you feel it is low)

For initial sharpening, the preferred need is to confirm the appropriate sharpening angle for your knife (15°/18°/20°/24°), which usually takes between 1 and 5 minutes for the first sharpening, and may take up to 10 minutes for particularly hard knives such as Damascus. Subsequent sharpenings only require a few back and forth rolls to restore sharpness.

Bonlasharp's diamond sharpening discs and sharpening stone discs are extremely durable under normal use and usually do not need to be replaced frequently. Diamond is the hardest material on earth and provides long-lasting sharpening results.

You can contact us through our contact page! We will be happy to assist you.