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Mammut
Workhorse HMS Screwgate Carabiner

4.793103448275862 out of 5 stars
29 Reviews
$18.95
Color:Grey

Size:

Quantity

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Why We Like The Workhorse HMS Screwgate Carabiner

Mammut's strongest 'biner, the Workhorse HMS Screwgate takes on heavy loads. With the larger mouth able to accommodate multiple ropes, slings, and knots, this 'biner is our go-to center for anchors, while the bright open indicator makes sure we never forget to lock it up.


Details

  • Heavyweight locking carabiner for belays and anchors
  • Screw gate for security and single-hand operation
  • Keylock nose prevents snagging on your gear and rope
  • Larger size for improved handling with gloves on
  • Item #MAMU5BJ
Material
aluminum
Gate Type
screwgate
Features
keylock nose
Major Axis Strength
27kn
Minor Axis Strength
12kN
Open Gate Strength
8kN
Dimensions
4.7 x 3.1in
Claimed Weight
2.6oz
Activity
canyoneering, ice climbing, mountaineering, sport climbing, trad climbing
Manufacturer Warranty
2 year

What do you think about this product?

Overall Rating

5 based on 29 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 0 reviews
3 Stars - 0 reviews
4 Stars - 6 reviews
5 Stars - 23 reviews

Customer Images

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5 out of 5 stars

October 9, 2025

Really sturdy carabiner

Using the Workhorse as my primary carabiner for both lead and top rope gives me the peace of mind when I'm indoors or out. The orange unlocked indicator is also a big help when double checking my gear. TLDR - Workhorse is tough, orange helps monkey brain be safe on wall.

John N
ExpertVoice.com

Originally reviewed on ExpertVoice.com

4 out of 5 stars

October 7, 2025

Good, but very Large.

Overall a find large locking screwgate carabiner. I particularly love the orange to remind you to lock it, and the anodized look is quite nice. I just find that most of the time this carabiner is way larger than I need it to be and takes up a lot of space on anchors.

Titan C
ExpertVoice.com

Originally reviewed on ExpertVoice.com

5 out of 5 stars

October 2, 2025

does its job

not a lot to say but its a carabiner. safe, reliable, good looking, etc.

Kevin G
ExpertVoice.com

Originally reviewed on ExpertVoice.com

4 out of 5 stars

September 14, 2025

Great all around carabiner

I use this carabiner along with a d shaped locker on a locker draw. The HMS workhorse always comes in handy as a PAS, extra qd, anchor extension. Only complaint is not having a round bar or a hybrid with the basket as a round stock. Otherwise there is good smooth action on the screw and gate.

Marc Anthony F
ExpertVoice.com

Originally reviewed on ExpertVoice.com

5 out of 5 stars

September 4, 2025

Very large carabiner

Very large carabiner great for any use. Because of the size, they are easy to use with gloves. Despite the huge size, they are light compared to other carabiners. Smooth screw action on the locker.

Patrick L
ExpertVoice.com

Originally reviewed on ExpertVoice.com

5 out of 5 stars

September 3, 2025

Love the orange on the gate to show you if its locked

Blake E
ExpertVoice.com

Originally reviewed on ExpertVoice.com

5 out of 5 stars

September 2, 2025

Perfect for anchor building

I love the size of this carabiner for making anchors while canyoneering. Provides plenty of space for the rope and whatever else you need to attach to the anchor.

Samuel S
ExpertVoice.com

Originally reviewed on ExpertVoice.com

4 out of 5 stars

September 1, 2025

Great Locker

Pretty much a standard locker, works well, does what it's meant to

Aaron H
ExpertVoice.com

Originally reviewed on ExpertVoice.com

4 out of 5 stars

August 25, 2025

Great locking carabiner

Carabiner is great, it's definitely bigger than I need for setting up an anchor but it works great and the extra safety feature of the orange tape is nice.

Ariana S
ExpertVoice.com

Originally reviewed on ExpertVoice.com

5 out of 5 stars

August 8, 2025

Great carabiner

Great carabiner I’m using for belaying on my neox. It’s overkill for that but honestly I can’t complain.

Daniel M
ExpertVoice.com

Originally reviewed on ExpertVoice.com

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