DMM Belay Master Screw Lock

DMM

531290197328

The original, tried and trested.

Closing the clip on the Belay Master ensures the carabiner is safe for use. It can only be closed when the gate is screwed shut.

When closed, the clip keeps the carabiner in its strongest orientation, prevents devices and knots from moving onto the spine, eliminates possible cross-loading due to rotation. This feature makes the Belay Master the perfect belay carabiner for those new to belaying.

Belay carabiner for consistent rope control and compatibility with belay devices
Belay carabiners give smooth and confident belaying with tube and assisted breaking belay devices. They have full section top bars for consistent rope control and reduced rope wear. Their shape resists flipping into sub-optimal orientations when belaying, acting to ensure the carabiner loads along its strongest axis.

Offset D carabiner for optimal loading and ergonomics
D-Shaped carabiners encourage loading in their strongest orientation by forcing loads toward the carabiner spine. An Offset D refines this basic design by extending the top bar, increasing internal volume. This improves handling and compatibility with thick ropes and slings.

Nylon clip ensures carabiner loads correctly
The Belay Master's nylon clip prevents accidental opening of the locking mechanism and ensures the carabiner loads in its strongest orientation. This makes an ideal belay carabiner for new climbers.

Full section top bar for consistent rope handling and increased longevity
A rope running over a full section top bar has more consistent handling characteristics than one running over an I-Beam surface. Our belay carabiners feature full section top bars for greater control rope control. Ropes loading over full section bar also bend less than those loaded over I-Beam surfaces, increasing rope longevity.

Keylock nose eliminates snagging
This carabiner's nose slots into a groove in the gate, allowing it to achieve full strength without a gate notch. This creates a clean internal profile that won't catch on gear, bolts or slings, giving easier clipping and removal from systems.

I-Beam construction for optimum strength to weight ratio
I-Beam construction techniques allow carabiners to be lighter without compromising strength. This is achieved through hot forging, a process that allows metal to be made into complex shapes that improve functionality.

I am a huge fan of orientation-limiting biners for belay device connection - either onto my harness or directly off the belay! Besides the ergonomic help in always having your belay device in the same space/place meaning you do not need to look at it, nor do you need to keep ensuring correct orientation/loading, as with the knot on the climber's harness, this is the single connection point and deserves to have as much redundancy / correct usage as possible without human interference.

The correct usage of these orientation-limiting locking 'biners is the narrower end (the end with the internal wire) attached to the belay-loop or belay anchor and the pear nose of the 'biner for the device. 
When belaying off your harness in this manner, the 'biner is often vertically aligned. This means that the locking barrel on a screw gate locker is at risk of unscrewing because gravity is pulling it downward, and active belaying can sometimes cause the barrel to "shake down/loose"

The Belay Master plastic locator prevents this, as well as ensures that the biner cannot pivot around the belay loop, causing cross-loading.

Also, you *know* that your device is locked when the gate closes because the plastic cover will not close with the locking barrel 'down'!

Item
Dimensions
Weight
MBS

(main axis)

MBS

(minor axis)

MBS

(gate open)

Gate Opening
Belay Master
70x115mm
93g
25kn
10kn
8kn
20mm

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