Trad Climbing Gear
Passive Pro

Nut History

Starting out with pebbles wrapped in hemp, nuts have been used for climibing for aroung a 100 years

• 1920s (Natural Stones): 

  • around 1926 - British climbers like Morley Wood first used natural pocket pebbles and stones wrapped in hemp cord or rope loops, jammed into rock cracks for protection

• 1950s (Machine Nuts)

  • Climbers in England and Wales use Machine Nuts

    • Joe Brown and Don Whillans scavenged hexagonal steel machine nuts from railroad tracks and engineering factories

      • Particularly around Snowdonia and railway workshops

    • They drilled out the sharp internal threads and threaded them onto hawser-laid rope to protect hard routes like those on Clogwyn Du'r Arddu (Cloggy)

• 1960s (Commercial Nuts)

  • Dedicated manufacturing began when John Brailsford in Sheffield produced the first commercial aluminum nut

    • 1961 - the Acorn

    • 1962 - MOAC 

  • 1962 - Trevor Peck introduced Crackers

    • Caving-inspired swaged steel wire loops replaced thick rope cord

    • Wires allowed smaller nut sizes, higher strength against shock-loads, and much easier placement and removal

  • 1966 - Royal Robbins brought nuts back to Yosemite

    • They are considered a lightweight, faster alternative to damaging steel pitons

  • 1969 - Bill Forrest introduced the multi-faceted Copperhead

    •  A malleable copper cylinder swaged onto a single wire cable

    • Initially designed as budget-friendly passive protection

    • Were widely adopted by big-wall climbers who hammered them into microscopic rock seams

• 1970s (Mainstream & Wired Nuts)

  • 1970 - Tom Frost saw chocks used in the UK (borrowed from Chris Bonington) and brought the idea back to Yvon Chouinard

  • 1971 - They began developing and producing new removable protection tools like Hexentrics and Stoppers.

  • 1972 - Stoppers and Hexes officially debuted in the Chouinard Equipment Catalog

    • 1972 - Doug Robinson's clean-climbing essay in the Chouinard catalog accelerated the shift away from pitons

  • 1973 - Bill Forrest introduced the Titon (which he co-developed with Kris Walker)

    • A multi-faceted, T-shaped nut engineered with passive camming features 

    • Allowed for up to 15 different placement orientations

• 1980s

  • 1983 - Hugh Banner (legendary British climber and founder of HB Climbing Equipment) introduced offset nuts 

    • Dessinged for flaring cracks

    • Featured a unique double-transverse taper (top-to-bottom and side-to-side) that provided secure placements where other protection would fail

  • 1987 - Hugh Banner introduced Ball Nuts 

    • Active protection device to secure exceptionally narrow, parallel-sided cracks that were too small for traditional spring-loaded camming devices (SLCDs)

    • Used a sliding copper ball on a guided wedge to expand inside the crack

  • The Rise of Cams

    • Spring-loaded camming devices (SLCDs) took over protection for parallel and wider cracks

    • Passive wire nuts remain essential for narrow constrictions, micro-cracks under a half-inch, and alpine weight-savings

Nut Recomendation

• Recomendation: A full sets of wired nuts (generally a small and large set)

  • DMM Peenuts 1-5

    • or  Wild Country Superlight Offset Rocks

  • DMM Offset 7-11

    • or Black Diamond Offset Stoppers

  • Usually separated into two oval carabiners

Nut Types

Climbing nuts, also known as stoppers, wires, or chocks, are passive protection devices consisting of a metal wedge attached to a wire or cord, either threaded through, soldered or swaged into the nut. When placed in a rock constriction, the nut wedges securely in place to protect the climber by catching a fall.

Nuts can be categorized by their shape, material, and specialized design:

Standard / Straight Taper Nuts

• Boxy or symmetrical wedge shapes with straight or gently curved parallel faces

• Best for the vast majority of standard, parallel-sided cracks

• Examples include 

  • Black Diamond Stoppers

    • A classic, budget-friendly, and durable standard nut 

    • Features a straight-sided taper design that makes judging placement quality straightforward

    • Staple on so many trad rack worldwide (typically sizes 1 through 13)

  • Wild Country Rocks

    • Widely considered the original wire-nut design

    • Features a slight curve that creates multiple contact points in parallel and irregular crack

    • Color-coded for fast identification and span sizes 1 to 14

  • DMM Wallnuts

    • Known for a slightly scooped face profile that helps them seat securely in shallow or slightly irregular rock features

    • Color-coding system matches Wild Country, and they excel in parallel placements

  • Metolius Ultralight Curve Nuts

    • Built with an asymmetric curve and straight-sided taper blend that reduces weight by about 30% compared to traditional stoppers 

    • Offering multi-contact stability

Offset Nuts

• Tapered across both their face and their sides (asymmetrical taper)

• Designed for flared cracks, irregular pockets, or pin scars where a standard symmetrical nut will not rock or seat properly

• More versatile than Standard Nuts

• Examples include 

  • DMM Alloy Offset (Sizes 7–11)

    • Widely considered the best overall offset nut

    • Features an asymmetric tapered shape

    • 12 kN strength ratings across all sizes,

    • Grooved face that bites well into irregular or textured rock

  • DMM HB Brass Offset / Peenuts

    • Top choice for micro-sized placements and thin seams

    • Softer brass or alloy heads deform slightly under load to gain a secure bite in micro pin scars

  • Wild Country Superlight Offset Rock

    • Ultra-lightweight option featuring a hollow center design

    • Popular for trad and alpine climbers trying to cut down weight on their harness

  • Black Diamond Offset Stopper

    • Offset adaptation of classic BD Stoppers

    • Reliable aluminum wedge geometry for irregular fissures and pin scars

  • Metolius Ultralight Curve Nut

    • Features a double-offset, double-curved design providing multiple points of contact in uneven rock

Micro Nuts / Brassies

• Very small nuts made of softer metals like brass or copper soldered directly onto stiff micro-wires

• Used for thin micro-cracks and aid climbing

• Softer brass/copper deforms slightly to "bite" into the rock, though they can be harder to clean

• Examples include 

  • DMM HB Brass Offset (Brass Offsets / IMPs)

    • Widely considered the top pick and most popular brass micro nut on the market

    • Softer brass heads deform into rock micro-scars and pin scars for exceptional bite

    • They wear out faster and are harder to clean

  • Black Diamond Micro Stopper / Offset Micro

    • Close competitor using a copper-iron alloy blend that is slightly more durable than pure brass

    • Features a rounded edge for easier cleaning

    • Great value alternative

  • Metolius Astro Nuts

    • Favorite for free climbers carrying a small set of brass nuts

    • Slightly asymmetrical

    • Work well in irregular or featured rock (like Smith Rock or The Needles),

    • Mix nicely with DMM brass offsets

Halfnuts / Lightweight Wires

• Narrower profile versions of standard nuts with a single stem or reduced width

• Excel in shallow placements, thin pin scars, and alpine routes where saving weight is critical

• Examples include 

  • DMM Halfnuts

    • Features the exact same tried-and-tested tapered face and side profile as the classic DMM Wallnut

    • Sliced in half lengthwise

    • Over 42% lighter than a standard Wallnut set

    • Features single cables on sizes 1–7 and a hollow extrusion with dual thin cables on sizes 8–11

    • Lower strength rating (4–6 kN) than full-size nuts

Hexes (Hexentrics)

• Large, six-sided hollow metal tubes mounted on a wire cable

• Oldschool 

• Their asymmetrical cross-section lets them rotate into different widths when placed on their axes or end-wise

• Shine in rapidly widening cracks where spring-loaded cams might "walk" out of place

• Example

  • Wild Country Rockcentrics

    • Widely favored by traditional climbers

    • Features a rounded shape that places well in irregular cracks and holds reliably in parallel horizontal cracks without strong constrictions

  • DMM Torque Nuts

    • Popular for their curved, asymmetrical design and built-in extendable slings, which let climbers save quickdraws and reduce rope drag

    • Larger sizes cover ranges from fingers to fists effectively

  • Black Diamond Wired Hexcentrics

    • The classic, original design introduced in 1971

    • Known for their asymmetrical cross-section and flat sides

    • Budget-friendly, durable, and shine in rapidly widening cracks where spring-loaded camming devices might walk out

Tricams

• A hybrid piece featuring a shaped metal cam/wedge head attached to a flexible webbing sling rather than a stiff wire

• Can be placed as an active camming device or as two different passive nut orientations, making them great for horizontal cracks and limestone pockets

• Example

  • CAMP Tricam Evo

Ball Nuts

• Active/specialized micro-protection unit featuring a sliding hardened steel ball against a tapered metal body

• Designed for ultra-thin parallel cracks that are too narrow even for the smallest micro-cams

• Examples

  • CAMP Ball Nuts

    • Originally introduced as "Lowe Balls" in 1987 by John Middendorf

    • CAMP’s version is widely considered the standard for ultra-thin, active protection in pin scars and parallel seams

    • Known for being slightly lighter across most sizes than their Trango counterparts

  • Trango BallNutz

    • Functionally very similar to the CAMP design (and historically produced with overlapping roots/patents)

    • Trango's version uses the same sliding ball-and-ramp concept for parallel-sided cracks and shallow flares

Color Coding Nuts

Racking Nuts

• • Some climbers will color code each set of nuts (small set and large set or set 1 and set 2)

    • Red taped nuts go on one caribiner

    • Green taped nuts go on antoher

Sizing of Nuts

• • Color coded individual nuts can be helpful

    • DMM Wallnuts and Wild Country Rocks share the same size/color scheme and have similarly sized nuts

    • Metolius Astro Nuts and Black Diamond use their own sizing systems and colors different from others and each other

  • Uncolored nuts have been used for decades

    • Wild Country Rocks can be purchased color free

    • Colors on nuts also wear with time

Other Passive-Like Pro 

• Special climbs and some Climbers prefer Specialized Pro

  • Big Bros

    • Spring-loaded telescoping tubes used for extra-wide cracks

    • Example

      • Trango Big Bro

  • Sky Hooks

    • Specialized, small metal hook used primarily in aid climbing and caving to support a climber's body weight on micro-edges, tiny rock flakes, or shallow pockets where handholds or standard protection (like cams or nuts) will not fit

    • Examples

      • Petzl Reglette (Small Skyhook)

        • Compact, tapered-tip steel hook designed for small flakes, tiny terror-edges, and drilled holes (bathooking) during aid climbing or positioning

        • Popular because of its neat, pre-sewn Dyneema sling and reliable geometry

      • Black Diamond Cliffhanger

        • A standard-sized, versatile skyhook featuring stabilizing wings designed for small crimps and holes used in technical aid climbing and bolting

      • Black Diamond Talon

        • A three-in-one multi-prong hook with a wide base for extra stability on hard rock like granite

      • Black Diamond Grappling Hook

        • A larger, deeper hook with a chiselled tip and long shank meant for reaching and securing larger rock features or pitons

      • Pika Hooks (Pikavo)

        • Known for a twist design that adds significant strength, with models like the Spoonbill capable of holding heavier loads

  • Pitons

    • Old school spike that are hammered into rock

    • NO longer widely used as the cause irreversible damage to rock

    • Examples

      • Black Diamond Lost Arrow

        • Widely regarded as the most versatile mid-thickness, hot-forged tapered piton for medium-sized cracks and general aid climbing

      • Black Diamond Angle

        • A classic U/V-shaped folded steel piton known for high holding power in parallel or widening cracks

        • The larger sizes are traditional staples for heavy-duty protection

      • Black Diamond Knifeblade (Bugaboo)

        • Thin, precision-ground steel blades designed to hammer into extremely thin, shallow seams or micro-cracks where passive gear cannot fit

      • CAMP Fixed Ring / Soft Pitons

        • Popular for limestone and brittle rock types because the softer metal conforms closely to irregular rock shapes without cracking the stone

      • V-Shaped & U-Shaped Corner Pitons (Singing Rock / Camp / Stubai)

        • Spring-loaded sheet steel bends that excel in larger pockets, irregular seams, and alpine or winter mountaineering anchors