DMM
Up and Under in Cardiff, UK, offers an extensive range of DMM products, catering to climbing, mountaineering, caving and professional work needs, as well as providing kits for outdoor activity centers and youth groups. DMM, originally founded as Moorhouse Engineering in 1981, transitioned to larger premises in Llanberis in 1986 and marked 40 years of manufacturing in 2021. The company, which started with just four employees, now boasts a workforce of over 200. Central to DMM's mission has always been to produce top-quality equipment at the best price, a commitment that has driven continuous innovation and growth in both recreational and industrial markets.
DMM’s success is rooted in its dedication to innovation, consistently investing in factory infrastructure, advanced machinery and product development to remain a leader in the industry. This approach has positioned DMM as a global frontrunner, backed by a skilled and loyal workforce. Recent expansions, including a purpose-built assembly area and CNC machining section, exemplify their commitment to efficiency and competitiveness. As the only UK manufacturer of climbing hardware, DMM continues to strengthen its unique market position, ensuring a robust future for both its recreational and industrial product lines.
DMM
Porter Rope Bag
The DMM Porter Rope Bag is designed for carrying loads over long distances. Constructed with heavy-duty tarpaulin and a waterproof lid that will protect the bag's contents from the elements, the Porter Rope Bag offers great durability. It also features a moulded back panel and padded rucksack straps which create a substantial carry system. The shoulder straps can be removed to facilitate snag free hauling and large haul/grab loops make for easy clipping and hanging.
DMM
Spectre - 6 Pack
The DMM Spectre is a lightweight, full-size all-round climbing carabiner designed for trad, sport, and winter routes. With wire gate construction for reduced weight and cold resistance, I-Beam hot-forged strength, and a minimized gate notch to reduce snagging, it’s a reliable essential for any rack. Available in multiple colours for efficient gear organization.
DMM
Impact Blocks
The DMM Impact Blocks are designed to be used in industries where loads may be dropped onto rigging with considerable impact forces. The combination of high quality materials and advanced production processes ensures a rope friendly, durable and robust block that looks great and performs even better.
DMM
Rigging Hub
The DMM Rigging Hub is a complex 3D rigging focused onto a single anchor. The DMM rigging hub can be used to form a super strong centralised anchor point for use in treework, rope access and rescue.
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Cortex/Apex Dry Pick
Dry tooling and mixed climbing pick for DMM Cortex or Apex ice tools.
DMM
Bulldog 2
The DMM Bulldog 2 is a versatile winter climbing tool designed for secure protection in frozen turf, ice and rock. Its ice axe-style pick with reverse-facing teeth ensures strong placements, while the large hammering area allows for quick, easy installation. The long handle provides leverage for simple removal and houses an extendable sling to reduce rope drag on wandering pitches. Tested to 10kN, the Bulldog 2 offers reliable security in tough, unpredictable conditions, making it a must-have for winter climbers.
DMM
Figure 8
The DMM Figure 8 is the perfect choice for both group and solo abseiling, featuring a wide karabiner hole that can accommodate two karabiners - ideal for rescue situations. If you frequently abseil and find your belay device overheating or wearing out quickly, the DMM Figure 8 offers a durable, reliable solution that ensures smooth descents every time.
DMM
Centre Threadback
The DMM Centre Threadback is a robust harness that's ideal for group and activity centre use. They are easy to put on correctly thanks to handy colour coding and the tie-in/belay loop is positioned high for ease of access, with safety point colour coding and threadback stainless buckles.
DMM
Triple Attachment Pulley 2
The DMM Triple Attachment Pulley 2 is a firm favourite for working at height professionals all over the world and forms an integral part of the renowned Hitch Climber System. It features a three-hole construction that makes organising and rigging easy, whilst allowing for off-centre hanging to minimise rope-to-pulley friction. With a new and updated design with sealed bearings instead of bushings, this pulley is easier to use then ever, with improved efficiency and new 'U' shape design that makes feeding in rope a lot more simple when used in a hitch climber system.
DMM
Pitcher Rope Bag
The DMM Pitcher Rope Bag is lightweight, with an integrated tarp that keeps your rope clean and stashes easily into the body of the bag. Shoulder straps let you carry the pitcher like a rucksack. This means it can be used as a route sack on multi-pitches, or put inside another bag to aid organisation.
DMM
Cortex Hammer Pair
The DMM Cortex Hammer (Pair) is a technical ice climbing tool that's well suited to mixed, ice and dry tooling routes. Ergonomic moulded handles provide additional insulation and grip, whilst an I-Beam design removes unnecessary metal, creating the striking exoskeleton profile that carefully distributes weight, resulting in a perfectly balanced swing. It features a round clip-in point to fit a DMM Shadow, Phantom or Phantom HMS karabiner, as well as an innovative cord point that can be threaded with up to a 5mm cord, this can be used to attach a DMM Freedom Leash.
DMM
Terrier
The DMM Terrier expands placement possibilities in challenging winter conditions such as water ice, frozen turf, and thin cracks, offering reassurance to climbers on precarious terrain. Its compact size enables usage in the narrowest of spaces, including small turf blobs, thin ice smears, and narrow seams. With a shorter handle, it minimises the risk of leverage in areas where a bulldog might dislodge.
DMM
Ultra O
The DMM Ultra O is a karabiner with symmetrical rope baskets, this makes it ideal for assisted breaking devices, pulleys, swivels and shackles. Oval karabiners allow pulleys to sit in an equalised position, the symmetrical shape also lessens the chance of shifting under load and potentially dislodging a marginal gear placement. The Ultra O is the perfect climbing aid!
DMM
Shadow HMS
The DMM Shadow HMS is a large yet lightweight HMS karabiner, designed for efficient belaying, rigging, and ropework. With a wide, deep basket that easily holds up to three clove hitches (<9.5mm rope) and a short gate for maximum opening, it delivers excellent handling and strength in a compact form. Available in Screwgate and multiple locking gate options, it’s an essential choice for climbers and professionals seeking high performance with low weight.
DMM
Shadow
The DMM Shadow is a lightweight, high-strength locking karabiner with a snag-free keylock nose and ergonomic Offset D-shape. Built using I-Beam construction for optimal strength-to-weight performance, it’s ideal for climbing, rigging, and all-round use. Available in multiple locking gate options to suit a wide range of needs.
DMM
Shadow Colour - 3 Pack
DMM have taken their best loved Shadow karabiners and coloured them in! This is to reduce confusion on the rock and simplify systems, plus it adds some razzle dazzle to your rack! Each karabiner looks very different, even in poor lighting - making it easier to distinguish what is what. These are suited for climbers of all abilities, who want easy identification of kit.
DMM
Revolver Wiregate
A revolution in more ways than one! The DMM Revolver wire gated karabiner features a small wheel in the rope location groove. The result is a reduction in rope drag of up to 30%, which can, in effect, reduce the weight of your rope. A Revolver on your rack lets you reduce rope drag and make efficient mechanical advantage systems without the need for additional devices.
DMM
Revolver
The DMM Revolver is certified for use as both a karabiner and a pulley. It is the same as DMM's standard Revolver karabiner, but it features a locking gate which provides extra security. There is a small wheel in the rope location groove to reduce rope drag, allowing the rope to run more efficiently through the karabiner. The Revolver is also highly useful for creating lightweight hauling systems. If you need to haul kit, a partner, or perform crevasse rescue, the pulley wheel increases the efficiency and converting more of your energy into movement.
DMM
Phantom HMS
The DMM Phantom HMS is an extremely compact and lightweight, yet strong karabiner with an optimised rope bearing surface that's ideally suited for belaying and rigging. The extra-short gate and slim tapering nose can easily take clove hitches and clipping slings.
DMM
Phantom
The DMM Phantom is their ultimate trad and alpine screwgate Karabiner, and when you hold those 42 grams you will understand why! They claim they could have made it even lighter, but didn't want to compromise the handling or strength. As you can see from the specification below the strength is still impressive and the gate opening reasonable for a small D shaped karabiner.
DMM
PerfectO Straight Gate
The DMM PerfectO Straight Gate is a true oval, compact karabiner that maintains the ease of use (even one-handed). Its shape provides effective centring of loads and the fully rounded rope bearing areas increase carabiner and rope longevity.
DMM
PerfectO
The DMM PerfectO is a compact true oval connector that minimises the eye-to-eye length whilst maintaining usability and easy one-handed use. Their shape provides effective centring of loads and the fully rounded rope bearing areas increase carabiner and rope longevity.
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30kN Boa HMS Keylock
The DMM 30kN Boa HMS Keylock is the heavier duty version of the 25kN Boa, it is hot forged from 14mm bar which gives it the 30kN major axis rescue that's required for rescue loads. Its ergonomics ensure that it is still easily operated whilst wearing gloves and the curved basket copes with even the busiest rigging set ups, allowing devices to settle comfortably.
DMM
Spectre
The DMM Spectre is an all-round carabiner for versatility and can be used across trad, sport, or winter climbing. They are full sized for ease of handling, while I-Beam construction and wire gates keep weight low. If you want one type of carabiner to cover all your climbing needs, you need an all-rounder. Wire gates are the lightest gate type available, and resist freezing shut in cold conditions. They are crucial in reducing the weight of your rack, and are ideal for trad, winter, and alpine climbing.