RH Preyda Tri-Hone Sharpening Kit
RH Preyda Tri-Hone Sharpening Kit
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Product Description
Ideal for sharpening sporting knives, kitchen knives, cutlery chisels, and wood-carving tools, RH Preyda’s Tri-Hone Kit comes with three separate stones for a natural sharpening progression. Use the synthetic Coarse Aluminum Oxide Stone to shape the initial edge of your blade; use the Aggressive Soft Natural Arkansas Stone to hone the edge; and use the synthetic Fine Aluminum Oxide Stone to polish it ... Read More

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Cromulent
241
May 28, 2019
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Technically these are rated as ultrahypermega coarse, super extra coarse, and hella coarse.
May 28, 2019
Kvothe
2
Apr 12, 2019
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Why is there still no word from MD or the manufacturer about the grit on these stones? Massdrop first sold this years ago and people have been pointing out over and over that the grits listed in the product description don't make any sense.
Apr 12, 2019
kmansell1243
4
Apr 15, 2019
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Grits are listed in the specs section
Apr 15, 2019
Dermott
190
May 31, 2019
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And they're wrong as a lips on a cucumber.
May 31, 2019
TriN
84
Apr 12, 2019
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Anyone knows if this is good for kitchen knives?
Apr 12, 2019
Dermott
190
May 28, 2019
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Given the grits listed for the synthetic stones, no, this is not useful for kitchen knives. The finest stone (according to Massdrop) in this set is a 320 grit Aluminum Oxide stone. I use a similar stone (from Norton) to set the initial bevel on freshly-made knives, that have never been sharpened before, because it's ridiculously aggressive. In reality, the Soft Arkansas stone in this drop is going to be significantly finer than that Aluminum Oxide stone. Despite being listed at 220-280, those stones are usually equivalent to about a 600-800 grit synthetic stone. See here for more info: https://www.danswhetstone.com/information/stone-grades-101/ I wouldn't use a Soft Arkansas stone on a kitchen knife unless it was unreasonably dull. Either this set is badly mislabeled, or... useless. Since I haven't bought it, I'm withholding judgement on which.
May 28, 2019
Hombro
61
Apr 11, 2019
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If the below numbers are the true specs, this thing couldn't sharpen a crayon. Someone please help me understand this product, as it seems vastly underpowered so I am assuming I have some basic misunderstanding.
  • Coarse Aluminum Oxide (synthetic stone): 120 grit
  • Aggressive Soft Natural Arkansas Stone: 220 to 280 grit
  • Fine Aluminum Oxide Synthetic Stone: 320 grit

Apr 11, 2019
Charlie2
67
Jan 23, 2019
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Dear Massdrop, Please verify and post the "Gritt," of the three stones. I agree with "Dermott," the advertised "Gritt" is way to aggressive. Thank you.
Jan 23, 2019
ShawnRufus
47
Jan 23, 2019
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A leather strop would be an excellent addition.
Jan 23, 2019
Gambit510
1
Nov 27, 2018
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Do you have to use the oil or can you use water like a whetstone? I assume only oil because these are synthetic stones, but I couldn't find a definite answer.
Nov 27, 2018
Rosebud41
270
Nov 28, 2018
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Most users of Arkansas stones say one can use either, but the manufacturer wants only oil to be used.
Nov 28, 2018
Dermott
190
Jan 23, 2019
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Don't use water on the synthetic stones. Depending on the binder they use, it may shorten the lifespan. Water won't hurt the Arkansas stone. They're traditionally used with a light mineral oil, but they work well with no lubricant, as well. Plain soap and water to clean the stone when you're finished, or it will become smooth over time as the metal dust gets into all the little low places in the rock.
Jan 23, 2019
Rosebud41
270
Nov 26, 2018
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Has MD still not clarified the grit rating issue? Preyda does not exactly clarify on their site. Here are their grit ratings: https://rhpreyda.com/explore/ Note these are grouped by "soft", "hard", and "hard black" and do not mention if the synth stones included here (2 of 3 stones) are comparable. And the product listing from mfgr is here: https://rhpreyda.com/product/tri-hone-kit/#1448918816272-6d27913c-edcf Looks like the same kit here, but mfgr says it includes only one synth along with a soft and an hard actual stone. Soft is 400-600, hard is 2000-3000, synth is ???. Does MD have a "decontented" Preyda tri-hone with a second synth replacing one of the Arkansas naturals? Why do Preyda and MD make buying this kit such a guessing game / leap of faith, especially when prior drops raised these exact same questions?
Nov 26, 2018
Rosebud41
270
Apr 11, 2019
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This is a weird listing as it has only one real stone and two synths, unlike what Preyda sells on their own site, which is two naturals and one synth. I asked MD to clarify, but no one here or from the mfgr seems to care. So I am not sure as to what you would be getting here. Caveat emptor!
Apr 11, 2019
Hombro
61
Apr 11, 2019
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Indeed, this is a weird one. And if the specs on the page are right (copied below), this thing tops off at 320 grit. What's the deal? Is this some type of different grit scale?
  • Coarse Aluminum Oxide (synthetic stone): 120 grit
  • Aggressive Soft Natural Arkansas Stone: 220 to 280 grit
  • Fine Aluminum Oxide Synthetic Stone: 320 grit

Apr 11, 2019
CaptNyan
27
Jul 11, 2018
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Welp, tariffs are killing my activity here now..... :(
Jul 11, 2018
professorrik
10
Apr 13, 2018
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Per the Preyda site; e. g., Soft Arkansas 400-600 grit, Hard Arkansas 800-1000 grit, and Hard Black Arkansas 2000-3000 grit. They offer no stones under the 400-600 grit.
Apr 13, 2018
GirDrops
22
Apr 14, 2018
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Thanks professorrik. As another person mentioned below, I think the numbers are a mistake. I'm assuming those who received it on the last drop enjoy it, because they haven't posted here about grit, even after complaining.
Apr 14, 2018
Rosebud41
270
Nov 28, 2018
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They do have these though: https://rhpreyda.com/product/aluminum-oxide-combination-stones/ and MD states two of the three stones in the kit are synths, and only one is an actual Arkansas stone. Would help if product was properly described in MD listing, but there is a chance here that this is a "decontented" Preyda kit being sold with a different inventory than what they sell elsewhere. The really low price for the MD listing raises those concerns also!
Nov 28, 2018
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