Questions? Sorted.
Which angle should I use?
20° for most kitchen knives. 15° or 18° for thinner, Japanese-style blades.
How do I sharpen with the Blunt?
The Blunt is the easiest way to sharpen your knives. Simply attach any metal knife to the magnetic holder, then glide the roller back and forth over your knife edge. Start with the diamond disc, then finish with the honing disc.
Will it work on my knives?
The Blunt works great with most knives, including metal kitchen knives, cleavers, filleting and hunting knives with a smooth edge. Scissors, serrated knives and bread knives are not suitable.
Can I sharpen Damascus steel?
Yes. Damascus steel is very hard, but the Blunt's diamond disc is harder. The constant angle (15°, 18°, 20° or 22°) also means only the cutting edge is resharpened, so the blade isn't damaged.
Can I sharpen ceramic knives?
No. Ceramic isn't magnetic, so the blade can't be held on the magnetic holder. The Blunt isn't suitable for ceramic knives.
Can I sharpen a one-sided ground Japanese knife?
Yes. Since these knives are often sharpened on one side only, you can resharpen just that side. The blade can be sharpened from both sides alternately, or on one side only.
How do I sharpen knives that are taller than the disc?
For taller knives, such as a large Chinese chef's knife, put a cutting board under the Blunt so the sharpener sits at the level of the cutting edge.
How long until my knife is sharp?
The first sharpening sets the angle and usually takes 1 to 5 minutes. Very hard steel, such as Damascus, can take up to 10 minutes. After that, a touch-up only takes a few strokes forward and back.
How often should I sharpen?
Whenever your knife starts to feel dull. After the first sharpening, a touch-up takes only a few strokes.
How long does the sharpening disc last?
Diamond is the hardest material on the planet and is the most durable sharpening material for quality kitchen knife steels. Used properly, the diamond disc does not need to be replaced.
Is the Blunt suitable for serrated knives?
No. The Blunt isn't suitable for serrations. Sharpening a bread knife would grind off the serrations and could damage the surface of the diamond disc.
Will it mark my benchtop?
Roll it on a chopping board or tea towel to protect stone and polished benchtops.
What if I don't like it?
You're covered by our 30-day risk-free guarantee.
What's the difference between the Original and the Pro Set?
Both use the same easy rolling action and four preset angles. The Pro Set adds a third sharpening disc, a heavy-duty metal roller and a storage case. Most home kitchens do brilliantly with the Original.
Do I need water, oil or any other liquid?
No. The Blunt is a dry system. There's no water, no oil and no soaking.
What do the diamond and honing discs do?
The diamond disc removes the first layer of steel to rebuild a dull edge. The fine honing disc then removes the burr and refines the edge, so it's sharp and smooth.
Which angle is best for Western vs Japanese knives?
Most Western chef's knives suit 20° (or 22° for tougher, heavier blades). Thinner Japanese-style blades suit 15° or 18°. If you're not sure, start at 20° for Western knives and 15° to 18° for Japanese knives.
Do I need to be good at sharpening?
No. It's built for beginners and precise enough for pros. Set the angle, roll the discs and you're done. There's no technique to learn.
Is it safe to use?
The knife is held on a magnetic holder, so you're not sharpening freehand. As with any sharp tool, keep your fingers clear of the edge and take your time.
Do I need to wash my knife after sharpening?
Give it a quick wash and wipe it dry before you use it, to remove any fine metal dust.
Will sharpening wear out my knives?
Any sharpening removes a tiny amount of steel. With a preset angle, only the cutting edge is reshaped, so the rest of the blade isn't touched.
Can I sharpen a very dull or chipped knife?
Use our #200 grit rough disc. Very dull knives just take a little longer on the diamond disc. Small nicks usually come out with a few extra passes.
Can I buy replacement discs?
Yes. Replacement discs for both the Original and the Pro Set are in our Accessories.
Is it a good gift?
Yes. It arrives in a premium box that's ready to give, and it's a gift people actually use.