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Black Diamond Offset Micro Review

For big walls, aid climbs, or any other route that requires incipient protection these micro-sized pieces of protection are hard to beat
black diamond offset micro climbing nut review
Credit: Black Diamond
Price:  $94 List
Manufacturer:   Black Diamond Equipment
By Ian Nicholson ⋅ Review Editor  ⋅  Jan 6, 2020

Our Verdict

A relative newcomer to the offset micro nut market, the Black Diamond Offset Micro offers some new tweaks on the older classic designs. The Offset Micro uses a copper-iron mix with similar overall characteristics to brass. Both alloys are softer metals than the more common aluminum. The result is it isn't as durable as aluminum headed models but much like brass models, slightly deforms to the rock offering better bite, something particularly nice in the smaller sizes. This does mean they aren't a great nut for everyday trad climbing as their thinner cables are more prone to kinking, and the heads will get beat up quicker. But for aid, hard-to-protect free climbs, and big wall routes, they are amazing. Compared to the most direct competition, this copper-iron blend BD uses is slightly tougher than our favorite brass nuts, but also means they don't deform as well and provide slightly less "bite." BD also rounded off one edge, which makes them a little easier to clean, though they aren't quite as good in more featured rock types. One of their biggest advantages is that they cost significantly less than the comparable DMM HB Brass Offsets. While we like the DMMs ever so slightly better, we think these are a far better value. If we had a Best Buy Award for softer-headed micro-nuts, these would get it.
Excellent in micro pin scars and flares
Less expensive
Metal deforms to rock the but offers better "bite" than aluminum models
Copper-iron blend is slightly more durable than brass options
Not for everyday trad climbing
Hard to clean
Fixed cables in the head make the wire more prone to kinking

Our Analysis and Test Results

The BD Offset Micro nut heads are made of a softer copper-iron blend that is similar in overall performance and character to brass, which isn't as tough as the aluminum found in a majority of passive protection. However, this softer metal slightly deforms to better contact the rock in which it's set, increasing the odds that they will hold a fall. As a result, they are not tough enough for everyday trad climbing but are perfect for big walls, aid routes, or thinly protected trad climbs.

Performance Comparison

black diamond offset micro climbing nut review - not durable enough for everyday trad climbing but pretty much...
Not durable enough for everyday trad climbing but pretty much required for big walls, aid climbs, and sparsely protected free routes. The Black Diamond Offset Micro is one of the best options available for protecting incipient seems and razor-thin cracks. Photo: Graham Zimmerman on the North American Wall, Yosemite, CA.
Credit: Ian Nicholson

Flares and Pin Scars

Over the past decade, smaller spring-loaded camming devices have gotten increasingly better and better, resulting in climbers carrying and using cams more frequently than nuts. Nuts are still an essential part of any climber's rack. However, most climbers tend to try to place cams first if the rock allows. Even "old school" climbers who learned to climb when passive protection reigned supreme have now mostly switched over to placing more cams than nuts on any given pitch.

black diamond offset micro climbing nut review - showing the top of the offset micro with its "offset" design -...
Showing the top of the Offset Micro with its "offset" design - narrower on one side than the other. This slight taper is designed to match pin scars perfectly but also works great in small flares and funky pods where no other piece of gear will hold.
Credit: Ian Nicholson

Due to most modern climbers cam-first protection selection, we rate a climbing nut's performance in flares and pins scars higher than other categories because these are the primary type of placements in which a cam is less useful, but a nut might be perfect. Even as cams have gotten better, the majority of them still need to be placed in parallel-sided cracks, and thus, offset nuts tend to work better in these types of placements.

black diamond offset micro climbing nut review - we love the sizes of this micro set and think it's a great...
We love the sizes of this micro set and think it's a great complement to your regular set of climbing nuts.
Credit: Ian Nicholson

All offset-style models work far better than traditionally tapered models in small flares and pin scars, and the Black Diamond Offset Micros are no exception. Each nut is narrower on one end of its head than the other and perfectly designed to fit into the types of flared placements where a cam would be marginal. Compared to their closest competition, the DMM HB Brass Offset, the two are quite similar, with the main difference being the BD's being ever-so-slightly narrower size for size. We don't feel that this is a major advantage or disadvantage; they just fit different cracks and perform very similarly while both sporting very similar taper or amount of offset overall.

Like other brass models, these are made of a copper and iron alloy, which is softer than aluminum options. This allows the head to deform to the rock and offer a better "bite" when weighted. This makes them less durable overall as they are more prone to getting beat up but also makes them more likely to hold, particularly in the smaller sizes.

Overall we feel these and the DMM HB Brass Offsets are the best models for the most incipient seams, which is why they are pretty much mandatory on big walls and aid climbs. We like the DMM Peenuts as a better everyday trad climbing nut, but there's no question that for the tiniest and most marginal placements, the small brasses (or brass-like nuts) are where it's at.

black diamond offset micro climbing nut review - it's not like these don't work in more parallel-sided cracks but...
It's not like these don't work in more parallel-sided cracks but more classically curved models worked better. However, we feel that these work better in parallel cracks than classically curved nuts worked in pin scars.
Credit: Ian Nicholson

More Parallel-Sided Cracks

In this category, it is important to remember that no nut or stopper is truly very good in properly parallel-sided cracks. In these cracks, active spring-loaded camming devices are certainly best. However, in our review, we compared each model's performance in more parallel-sided cracks, but these still need to have some taper for nuts to work.

Like other small offset models, the Black Diamond Offset Micros don't work very well in more parallel-sided cracks. Their lack of a curve on one side of the face means the nut only has two points of contact instead of a classic non-offset nut, which can maintain three points of contact and is thus significantly more stable in more-parallel sided cracks.

black diamond offset micro climbing nut review - comparing the bd offset micro with the dmm brass offset. we think...
Comparing the BD Offset Micro with the DMM Brass Offset. We think these are the two best brass (well, the BD is "like" brass) offset models on the market. We like the scope on the head of the DMM slightly better because it accommodates more featured or large grain rocks subtly better.
Credit: Ian Nicholson

Performance in Featured Rock

Black Diamond removes a small grove of metal from the sides of these nuts that are primarily used against the rock. This small groove helps to get a better placement when placing the nut in more textured or larger grained rock. We think this groove works quite well, but for folks needing micro-sized protection in more heavily featured rock, we like the DMM HB Brass Offset better, which features a deeper, and thus more effective, groove in the same location.

black diamond offset micro climbing nut review - comparing the profiles of the dmms (left) and the black diamond's...
Comparing the profiles of the DMMs (left) and the Black Diamond's (right). One aspect we like better with the Black Diamond Micros is they are easier to clean. This was because BD rounded off one of the inside edges of this nut. While we don't think makes a drastic difference, it is noticeable.
Credit: Ian Nicholson

Ease of Cleaning

These are one of the easier micro-sized nuts to clean and are slightly easier to remove than their closest competition, the DMM HB Brass Offset. That being said, they're hardly "easy" to clean, as their offset shape means they prefer to be backed out rather than rotated upwards for removal like more traditionally shaped non-offset nuts. One of the biggest differences between these and the DMM HB Brass Offsets is that Black Diamond rounded off one of the corners on the inside of the nut, which we found helps them to be removed slightly more easily than the DMM Brass.


Like most other models that use a softer metal in their head, these are not particularly durable. As we mentioned, similar to brass, their copper-iron blend heads deform to the rock slightly to offer greater holding power but also mean they get "beat up" and bent out of shape more quickly. Compared to their closest competition, the DMM HB Brass Offset, the Black Diamond models offer a slightly more durable metal. This is both good and bad. It means the heads will hold up better over time but won't deform to the rock as much when weighted, meaning they have less bite. Also, like with most other offset models, these, in particular, don't like to be cleaned by having the wire yarded upwards as the head won't typically rotate in the crack like a non-offset version and the wires are more likely to get kinked, especially in the smaller sizes.

As these aren't particularly durable, they aren't the best for day-in, day-out trad climbing. For that, a model like the aluminum headed (but still offset and small-sized) DMM Peenuts is best, especially when coupled with the DMM Alloy Offsets. While we don't think the Black Diamond Offset Micros are great for everyday traditional routes, they are perfect for difficult or thinly protected free climbs, and pretty much mandatory on any aid climb or big wall route.

Versatility and Use in Other Orientations

These nuts do have the ability to be placed in two orientations. However, along the secondary axis, where the narrower side of the head is in contact with the rock and the longer side faces out, there simply isn't enough metal for them to be very stable. Their secondary orientation should primarily be used for aid climbing or nesting, along with several other pieces of protection for free climbing.

black diamond offset micro climbing nut review - the bd offset micros are one the best offset nuts on the market for...
The BD Offset Micros are one the best offset nuts on the market for their price.
Credit: Ian Nicholson


The Black Diamond Offset Micro is more expensive than most aluminum options, but they check out pretty much in line with, or slightly less expensive than, most other brass models. They are also the least expensive offset nut, and our review team thinks they're a screaming deal at half the cost of the DMM HB Brass Offsets. If money isn't an issue, we do like the DMM's ever so slightly better, with their thinner, softer-metaled heads and a bigger scoped out section. Still, in general, the BD Micros are very nearly as good for a lot less money, and they are slightly easier to clean.

black diamond offset micro climbing nut review - perfect for big walls and sparsely protected free climbs, these...
Perfect for big walls and sparsely protected free climbs, these micro-sized pieces of protection are among the best on the market and are a great value buy.
Credit: Ian Nicholson


The Black Diamond Offset Micro isn't durable enough for everyday trad climbing because they aren't as durable due to the soft metal of their heads and their wires being more prone to kinking. For a smaller everyday nut, we'd recommend the still offset but aluminum DMM Peenut coupled along with the DMM Alloy Offsets. However, for thinly protected routes that require tiny protection along with any big wall or aid route, these things are undoubtedly the ticket. After extensive side-by-side comparison, we like the DMM HB Brass Offset slightly better because of their softer metal and subtly better performance in more featured rock, but without a sale on them, we think these are very nearly as good for a lot less money.

Ian Nicholson

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