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 Traction Chalk Bag
The DMM Traction Chalk Bag is ideally sized for trad and sport climbing and will accept a chalk ball as well as working great with loose chalk and block chalk. The stiffened, contoured top opening means the bag is always ready for access and guides your hand in swiftly for those urgent dips when the pump is starting to take hold.
DMM Torque Nut
The DMM Torque Nuts are designed to work in a similar fashion to Rockcentrics meaning they can be placed passively at a constriction or cammed into place in parallel cracks thanks to their offset edges. Additionally they are racked on extendable dyneema allowing the nuts to be neatly stowed on your harness and then extended when placed, eliminating then need for extra quickdraws. Four sizes are available covering a very wide range of large cracks.
DMM Spectre Quickdraw - 6 Pack
The DMM Spectre Quickdraw is a great choice for climbers looking to build their first rack. It uses two full-sized karabiners for ease of handling, with a small gate notch for reduced snagging and I-Beam construction to reduce weight. The karabiners are linked by a lightweight 11mm Dynatec Dyneema sling, making this the perfect starter quickdraw that's suitable for all styles of climbing.
DMM Spectre Quickdraw
The DMM Spectre Quickdraw is a great choice for climbers looking to build their first rack. It uses two full-sized karabiners for ease of handling, with a small gate notch for reduced snagging and I-Beam construction to reduce weight. The karabiners are linked by a lightweight 11mm Dynatec Dyneema sling, making this the perfect starter quickdraw that's suitable for all styles of climbing.
DMM XSRE
The DMM XSRE Karabiner is a miniature, ultra-light accessory clip that offers maximum strength in a compact size. With I-Beam construction and a Keylock nose, it provides smooth handling and excellent durability. Weighing just 8 g and rated to 4 kN, it’s perfect for racking accessories, tools, or keys – but not for PPE use.
DMM Ultra O Colour - 3 Pack
The DMM Ultra O Screwgate is an extremely symmetrical oval climbing carabiner, ideal for use with assisted belay devices, pulleys, swivels and shackles. Some oval carabiners are not as symmetrical as others, making them less useful for their designed purpose. The DMM Ultra O Coloured 3-Pack includes three different colours of the Ultra O screwgate carabiners.
DMM Shadow Bent Gate
The DMM Shadow Bent Gate is a bent gate aluminium alloy carabiner, perfect for rope side of quickdraws or racking gear. the I beam construction gives full strength but a reduced weight, making the Shadow a lightweight, full-sized carabiner. It also features a snag free keylock nose.
DMM Slide Lock Leash
Available as a stand-alone item, the DMM Slide Lock Leash is suitable for axes up to 55cm long. Employing a minimalist design for improved functionality and durability, the Slide Lock Leash is intuitive to use and operable with one hand. Vari-width wrist webbing ensures comfort without unnecessary padding or bulk; minimising water absorption. It replaces DMM's Standard and Choke Hold Leashes for winter walking and mountaineering.
DMM Brenin Slidelock iD
The DMM Brenin Slidelock is an upgraded version of their classic Brenin harness. It has increased durability and safety point colour coding on the clip-in and tie-in points. It also benefits from new Slidelock stainless buckles, vertical tie-in points and belay loop design. With DMM iD as standard.
DMM Revolver Rig Twin
The DMM Revolver Rig is a connector with an integrated pulley sheave. Featuring a high efficiency roller bearing sheave(s), a threaded removable captive bar and a full strength textile friendly basket.
DMM Shadow Straight Gate
The DMM Shadow Straight Gate is a lightweight yet durable karabiner for sport and trad climbing. Reinforced where it contacts bolts, it offers excellent longevity without excess weight. The clean nose design reduces snagging, while chamfered gate sides provide a secure grip for confident clipping. Compact and easy to handle, it’s ideal for building quickdraws and all-round use.
DMM Deadman
In winter, there are times when the only thing to lodge an anchor in is the snow itself. The DMM Deadman lets you make the most of this medium and improves on the classic ice axe belay by creating a larger surface area that increases resistance to the placement pulling through. Used in snow gullies and below cornice top outs, the Deadman creates protection out of nothing and provides security in the most insecure places.
DMM ProPad+ Edge Mat
The ProPad+ is a heavy duty rope protector that is suited to the demands of the outdoor activity industry. Thick natural fibre matting protects ropes against sharp edges typically found at the top of crags, railway bridges, and other sites suitable for abseiling and top-roping. A replaceable wear pad increases the ProPad+’s longevity, and helps it withstand the heavy use of large group sessions.
DMM ProPad+ Wearsheet
The DMM ProPad+ Wearsheet is a replacement sheet for the DMM Edge Mat. Suited to the demands of modern adventurers in the outdoor industry, the ProPad+ Wearsheet is a thick fibre mat that protects rope from sharp edges at the top of crags for top rope climbing or when anchor building for abseiling and rappelling. Replacing the Wear Pad will increase the overall longevity of the product and should be replaced when the previous sheet has worn through.
DMM Liquid Chalk
The DMM Liquid Chalk is ideal for ascending longer routes or tough boulder problems. Liquid chalk dries to give a resistant and effective layer that absorbs sweat to help give you more grip. Top up the layer with traditional dry chalk to help prolong the usage of both.
DMM Protection Pack 3
The DMM Protection Pack 3 is a great starter pack for anyone looking to get into trad climbing or just to top up their Up and Under Trad Pack! This set from DMM makes the perfect starting point for building a comprehensive climbing rack.
DMM Protection Pack 1
The DMM Protection Pack 1 is a great starter pack for anyone who wants to get into trad climbing or just as a top up to the Up and Under Trad Pack, see below on page.
DMM Protection Pack 2
The DMM Protection Pack 2 comprises of the Wallnut Set (1-11) and the Torque Nut Set (1-4), combined with free UK postage for awesome savings! These passive protection sets make for the perfect starting point for building a comprehensive climbing rack.
DMM Grippy Grip
The DMM Grippy tape allows the user to customise the grip on ice tools. Can also be used to replace worn out or damaged hand grips. To use simply remove the backing tape and apply tightly around the shaft or handle; keeping the tape taut but not too stretched.
DMM Edge Hog
Designed for use in rope access, the DMM Edge Hog fits through deck grating (commonly known as Kennedy Grating) which is found in many industrial situations such as oil rigs, chemical plants and refineries.
DMM Chalk Bag
The DMM Chalk Bag is loose chalk that gives a good all over covering, effectively drying your hands and keeping them on the holds. The Crushed Chalk Bag is perfect for topping up chalk bags, filling boulder buckets, and replenishing our Chalk Tub.
DMM Freedom Leash
Enjoy the benefits and freedom of leashless climbing without the risk of losing your tools with the DMM Freedom leash. Perfect for both beginner and advanced climbers tackling long committing routes and all round winter climbing.
off RRP
DMM Pinto Spacer
The DMM Pinto Spacer is an essential component for Pinto Pulley applications where textile connecting elements tend to compress the side plates.
DMM Pinto Rig Spacer
The DMM Pinto Rig Spacer is an essential component for Pinto Rig applications where textile connecting elements tend to compress the side plates.
DMM Belay Master Clip
The DMM Belay Master Clip is a spare locking insert that helps keep your karabiner in the safest orientation while belaying. Designed to prevent cross-loading and only close when the karabiner is locked, it's a small but powerful safety feature for climbers of all levels.
DMM Tomcat
The DMM Tomcat is a fully adjustable children’s climbing harness with breathable padding, a floating waistbelt, and two gear loops, perfect for growing climbers ready to tackle indoor walls or outdoor rock routes with confidence and comfort.
DMM Tom Kitten
The DMM Tom Kitten is a full-body climbing harness for children, offering high tie-in support, padded leg loops, and secure adjustability for growing climbers. Designed to keep young adventurers upright and comfortable whether climbing indoors or outside.