Black Diamond Micro Stopper

Priced: $9.99 - $14.95 Rated:   - 5 stars out of 5 by 8 reviews.
Black Diamond Micro Stopper -
Black Diamond Micro Stoppers Features.

Black Diamond Micro Stoppers.
Wedge in any crack or rock without fretting with the Black Diamond Micro Stoppers. Forged from copper-infiltrated iron, their heads are resistant from wearing but are also soft enough on the rocks for clean climbing. Each head utilizes a patent-pending transverse taper shaping process that provides a sideway placement option, so it won t wiggle as you pass by. The heads are patently swaged onto the cables, making it a much stronger attachment than soldered ones. All Micro Stoppers are equipped with sturdy galvanized steel cables, which make them prone to fraying after multiple uses. Each stopper comes in six different sizes, allowing it to be adaptable to any size of cracks. The first two sizes are for body weight aid use only, whereas you can use the bigger ones for free climbing. The most durable nut climbing tool, the Black Diamond Micro Stoppers will stop at nothing to help your ascent towards safe and clean climbing.
This product can only be shipped to U.S. addresses.

Key Features.


  • Read all directions and safety material before use.**

Weather and Wind:

  • Excel in ultrathin cracks, seams and fissures.


  • Sizes 1 and 2 are for direct aid only


  • For safety and/or sanitary reasons, this product CANNOT be returned
  • Patented swage is stronger, more flexible and less prone to fraying
  • Copper infiltrated iron provides great bite and durability.
  • Copper/iron mix in heads provides bite in thin placements
  • Patented, swaged assembly increases durability.
Rock/Creek Outfitters

To ascend today’s ultrathin gear-protected crack and face lines, micronuts are an essential tool. A full set of Black Diamond Micro Stoppers weigh less than a single quickdraw and opens up all sorts of protection possibilities. Micro Stoppers are made by shooting powdered iron into a die, and then melting copper into the iron. The copper fills into the iron’s grain structure, making the nuts stronger. The copper, being softer than the iron, adds ductability to the finished product. Utilizes Black Diamond’s patent-pending transverse taper shaping process.


The Micro Stoppers by Black Diamond is made of copper infiltrated steel, our Micro Stoppers bite like brass nuts, yet are less prone to shearing. Patented cable swaging increases strength of the cable.

FEATURES of the Black Diamond Micro Stoppers.


To ascend ultrathin, gear-protected crack and face lines, micronuts are an essential tool.

To ascend ultrathin, gear-protected crack and face lines, micronuts are an essential tool. Black Diamond makes the head of each Micro Stopper with durable copper-in€ltrated iron, giving it a tenacious bite while reducing shearing. A patented, swaging method replaces traditional silver solder techniques, greatly increasing cable life by making Micro Stoppers less prone to fraying after repeated use. Excellent for building that equalized rat’s nest just before you punch it to the next distant placement. Excel in ultrathin cracks, seams and fissures. Copper-infiltrated iron provides great bite and durability. Patented, swaged assembly increases durability.
Black Diamond Micro Stoppers are ultra-thin protection for aid climbing and thin trad lines. Copper-infiltrated steel heads fight shearing better than solid copper but are soft enough to prevent breaking the rock. The heads are swaged onto the cables, providing a more durable attachment than soldering. With Micro Stoppers you'll be able to sew up the thinnest cracks, even if you can't get your fingers in them. *Sizes 1 and 2 are meant for aid climbing only.
Versatile thin crack pro, trapezoidal Black Diamond Micro Stoppers feature a subtle curve on their longest face for maintaining utility in near-parallel cracks while still catching on crystals and irregularities. Each Micro Stopper is equipped with a durable, galvanized steel cable.
Mountain Gear
With a transverse taper that sits better in old scars, Micro Stoppers (swedges) from Black Diamond remain one of the best small-size additions to a set of Stoppers.
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Average Price History: Price History
Review RatingNumber of Reviews
Country of Origin:China
Strength:2 kN, 450 lbf (size1); 3 kN, 674 lbf (size 2); 5 kN, 1124 lbf (size 3); 6 kN, 1349 lbf (size 4-5); 8 kN, 1798 lbf (size 6)
Weight:0.74 oz / 21 g
Compare specifications to related products.

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Black Diamond #1 Micro StopperBlack Diamond #1 Micro Stopper$14.95

Subcategories of Protection:

Black Diamond Micro Stopper Reviews:


I bought these to supplement my set of anodized aluminum stoppers (down to 3), thinking that they would protect MUCH smaller cracks than my aluminum stoppers would. This has proven to be somewhat of a misconception, although the Micro stoppers fit shallower placements better than the aluminum ones, the #3 Micro fits cracks of a very similar width as the #3 alu. stopper,(see photo) likewise for the other sizes.
So why would you buy these (for free climbing) if you already have the aluminum set? First off, I have found that Micros seat better than alu in the same placements. This means that they are less likely to get wiggled out as you pass by, which is great, because if you're placing gear this small, its likely your only option for pro, so it NEEDS to stick. Secondly, because of the narrower head, Micros fit in shallower thin cracks that Alu stoppers would be unstable in. Third, Because of the lack of a cable crimp (the cables ends are permanently fixed in the stopper head), Micros are lighter and rack cleaner than equivalent Alu Stoppers.
For free climbing, these are really only necessary on a minority of routes, most of them 5.10 and harder. That said, these hardly take up any space or weight on your rack, and when you place one of these, there's a good chance that its the only thing that fits.
For free climbing, I'd recommend sizes 3,4, and 5. The 6 is hardly micro, and 1 and 2 probably wouldn't hold a fall. Also, 3+4+5 combined weigh about as much as a Neutrino, so they won't inconvenience you if yo don't use them on a pitch, but you will be STOKED if its all that's available and you brought them along.

Simon Hatfield at on 05/06/2011

Oh B.D. Micro stoppers infused with brass
You are nothing short of Totally Kick Ass
Your always with me when I'm out on a caper
Your there for me when the cracks are thin as a paper
Some people shiver but my eyes just gleam
When ahead lies nothing but a miniscule seam
I have no reason to fear
When I've got you hear
Yes right on my gear loop you wait in a set
Oh BD Micros you are a sure fire bet
Sometimes I'll even resort to the two and the one
but I try not to whip because it wouldn't be fun
But when I whittle in a good number three
I know it is bomber and this gives me glee
How many sad stories end with and then it got thin
But I didn't have micros and so couldn't win
I don't ever want to sing that sad lonesome tune
So I always have micros when I shoot for the moon
You've saved me from abrasions, sprains and even broken legs
That's why to you Micros I owe oh so much thanks.
Thank you Micros thank you.... I love you you are my bestest friend
My love for you knows no bounds, borders nor even an end.
So one more time micros get on my rack
And lets go sketch out up a micro thin crack.

Cedar Wright at on 04/30/2010

These are much stronger for the size than regular aluminum nuts. They are pretty tough and set nicely. You should really only use the steel stoppers in hard rock like granite, use brass ones on stuff like sandstone.
The wires can bend at the joint pretty easy, that is my only gripe but it happens, what ever...

Mato at on 11/30/2010

The are some great nuts! Very light and although you want your placements to be perfect with micros, these are easy enough to place. I took a few 10 ft whips on a #4 and the piece was still in tact after, no kinks. They are so light, it's worth carrying them just in case.

ash3561097 at on 03/07/2010

I agree with Grove, I hate falling on these, but when a whipper is coming, I take at least a little reassurance in these things. Also they are way more durable than any other micro I have used. If needed you can lightly hammer them into a crack and they still remain usable afterward.

Matthew Cox at on 03/31/2009

So it is not my favorite activity, falling on Micro's. But if I have to these are the ones that I choose. Never let me down unless I make a bad placement. Extremely durable also, made to take a beating.

Garrett Grove at on 12/11/2006

Took a whippet on the silver, held like a champ, little deformation in the wire due to placement, but fantastic easy to place pro. I like how one of the wide sides flare for placements in little seams

J. Runnells at on 12/01/2009

These little wires are burly, they stand up to more beating then standard brass, and the taper makes them fit into funky cracks nicely.

Evan Stevens at on 12/03/2008