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
Reviews
Q&A
What do you think about this product?
Overall Rating
5 based on 20 ratings
Review Summary
Customer Images
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Selecting an option will reload the available reviews on the pageAugust 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.
Originally reviewed on ExpertVoice.com
April 29, 2025
Strong, lightweight, sturdy, full of features!
This carabiner rocks! This is a very strong carabiner which has some very nice attributes. Even though it is a larger sized carabiner, it is lightweight for its size and has a nice smooth screw gate. The orange/red coloring to notify if you have forgotten to lock the carabiner is a nice feature. I appreciate the large opening which is helpful in several canyoneering/climbing scenarios. I primarily use my workhorse carabiners in southern Utah canyons in very rough, wet, gritty, sandy, conditions. These have held up wonderfully, and I feel like I get some of the most bang for dollar with these carabiners. These larger carabiners work well for the 4-5 tie-in points for my sandtrap anchor for canyoneering. I started out with 6 a while back, but have recently ordered 4 more. Seems like you can never have too many quality carabiners in the gear collection or in a canyon.
Originally reviewed on ExpertVoice.com
April 12, 2025
Excellent large locker
These exceeded expectations. Nice snappy gates, bigger than I expected, and feel quite durable. I currently have them on my anchor slings.
Originally reviewed on ExpertVoice.com
April 5, 2025
Good strong carabiner
Great strong carabiner, big wide shape good for stout master points or securing shoes and gear to packs and harnesses
Originally reviewed on ExpertVoice.com
January 20, 2025
Well Built
Solid construction and nice and lightweight. Love the orange indicator feature. I replaced my saddle manufacturer carabiners with these, and I wish I had done it sooner.
Originally reviewed on ExpertVoice.com
September 27, 2024
My favorite big carabiner
I love mammut’s orange locking identifiers. It makes it harder to miss an unlocked carabiner for sure.
Originally reviewed on ExpertVoice.com
May 1, 2024
Solid locker.
Solid locker that has solid testing results. It’s my favorite go to for belay or even anchor building
Originally reviewed on ExpertVoice.com
March 11, 2024
Just like the name says
I really like this carabiner and especially the visible cue that it is locked.
Originally reviewed on ExpertVoice.com
March 10, 2024
Solid screw gate carabiner for building an anchor.
Originally reviewed on ExpertVoice.com
October 16, 2023
Might be my all time favorite locking HMS. It has a massive basket and is surprisingly light. These are my go to for anchors.
Originally reviewed on ExpertVoice.com
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