Locking Mechanisms
Locking carabiners are used to perform a variety of tasks. The suitability of a locking carabiner to a
particular task will depend on its shape, the material it is made from, the type of locking mechanism it
uses and the design of the body.
DMM produce a variety of locking mechanisms that each have their own strengths
Design
Options
DMM’s priority with all our equipment is safety and
functionality – locking carabiners are no different.
All of our carabiners meet either the mountaineering standard EN 12275 or the industrial standard
EN 362 (Personal Protective Equipment against
falls from a Height) for connectors and most
meet both. However DMM also go beyond these
standards in several areas and therefore all of the
barrels in our screwgate range are manufactured
from high quality 7075-T6 aluminium alloy. This
means our alloy locking carabiners massively
exceed the required 1kN push-in test that simulates
a gate being levered against a sharp edge - all
carabiners are at least 5kN and the heavy duty
models exceed 16kN.
All our locking carabiners for 2016 have a keylock
nose to prevent snagging, but less obvious is the
fact that many have our patented Taperlock nose
that gives even greater side-loading strength.
One of our strengths is hot forging and reducing
weight to a minimum, however we don’t do this
at the expense of functionality or durability. All of
our rope radii are made wider than requirements
so that they are kind to ropes, and any surface
that has rope running across it, such as on HMS
belay carabiners, is made round with minimal or
no I-Beaming so that the rope runs smoothly and
predictably.
We also take great care with the overall shape of
our carabiners so that they resist cross loading
and try to load in the optimal way. Above all just
pick up one of our lockers and look at the finish,
wind the barrel up and down to feel how smooth
it is and open the gate to feel the firm consistent
action.
Colour Packs
The Big Boa, Shadow and Ultra O are available in
colour packs: a useful feature, particularly in an
instructional or guiding situation, to aid stance
management by helping to easily identify attachment points.
Captive Bar
Most carabiners can be supplied cross-drilled to
accommodate captive bars. The captive bars are
not for load bearing use. This means that the
lanyard or attachment cannot be removed and
ensures that the direction of force applied in
the event of a fall is along the major axis of the
carabiner, giving maximum strength and holding
power. Available loose with most aluminium and
steel carabiners. Contact us for further details.
Locking Carabiner Range
¢
Screwgate – The most popular locking mechanism for climbers. They have a threaded barrel/
sleeve that is rotated to lock the gate. Used for belaying, critical runners and at anchors,
they’re secure and unlikely to come undone once screwed shut. Our screwgate barrels
feature a new knurled profile to assist gripping in wet or icy conditions. Compared to other
gate options screwgate biners are lighter and have a wider gate opening.
¢
Anti-vibe – For extra security an anti-vibe (anti-vibration) screwgate is available with some
carabiners. Originally developed for systems on helicopters, they also offer added assurance
where attachment points may not be easily accessible and for bottom roping.
¢
Kwiklock – The Kwiklock automatic locking system is the fastest gate locking mechanism
to operate. It provides a convenient solution to eliminating the chance that the gate will
accidentally be left unlocked.
¢
Locksafe – The triple action of the Locksafe mechanism significantly reduces the chance of
accidental gate opening and is a major step forward in improving the safety of automatic
locking connectors.
¢
Durolock – The Durolock (Dual Rotor Lock) was designed to minimise the chances of
accidental gate opening, and maximise levels of security. Its complex, yet easy to
manipulate gate requires four distinct actions to open, and once released, automatically
returns to the locked position. It is perfect for complex rigging applications.
screwgate
– Strong, high volume carabiners for
applications such as setting up belays
Rigging
Personal locker
– General purpose
biners that are carried when climbing and used
on sling runners/multi-pitch belay stances
Specialist – Application specific lockers
Steel Lockers
devices
Belay – Optimised for use with belay/abseil
Boa
Belay Master 2
Shadow
Ultra D
Steel I-Beam Oval
30kN Boa
Rhino
Phantom
Ultra O
Steel I-Beam Shadow
Klettersteig
Sentinel
Aero
Revolver
Steel I-Beam
Klettersteig
Zodiac
Aero HMS
anti-vibe screwgate
KWiklock
locksafe
Durolock
Steel Carabiners
We also have a range of steel carabiners which
are heat treated for high strength and durability.
Widely used for rope access work, they’re also
popular with outdoor centres for group use.
Bringing I-Beam construction to our steels has
reduced the weight without compromising on
strength.
Step 1.
¢
KWiklock ANSI
¢
Step 2.
Step 3.
Locking
Carabiners
Locking
Carabiners
Locking Carabiner Features
Step 4.
ANSI – Our Locksafes and Kwiklocks are also available with the very strong ANSI (American
National Standards Institute standard) compliant gates. Biners with ANSI gates are intended
for industrial use where the gate may be subject to forces outside of recommended use such
as cross loading. Any ANSI gate must meet the minimum ‘all round’ gate strength standard
of 16kN: that is minor axis, push-in and side-load tests.
Steel I-Beam Boa
locksafe ANSI
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