Mammut Smart HMS 2.0 Carabiner
Best secure belay carabiner for sport and multipitch climbers.
This carabiner solves the classic belay loop twist by physically locking itself into the correct orientation. It’s a brilliant, foolproof safety upgrade for anyone tired of cross-loading, though the specialized gate mechanism means it’s best paired with a compatible belay device rather than used as a general-purpose locker.
$17.00
at
Mammut
Who it's for
- Belayers needing versatility for Munter hitches and multi-rope setups
- Climbers prioritizing reliable, smooth screwgate security
- Trad climbers managing bulky knots and complex anchor points
Who should skip it
- Weight-conscious alpinists seeking ultralight gear
- Budget-focused climbers looking for entry-level hardware
- Minimalists wanting a streamlined, low-profile gear rack
Performance breakdown
Belay loop security
The integrated safety gate effectively eliminates dangerous cross-loading risks.
Handling ergonomics
Intuitive design makes clipping and unclipping feel fluid and natural.
Weight-to-strength ratio
Optimized construction delivers high breaking loads without unnecessary bulk.
Gate operation
Screwgate mechanism is reliable, though requires deliberate action to engage.
Snag resistance
Key lock nose design ensures smooth transitions without catching on gear.
Device compatibility
Perfectly engineered to pair seamlessly with the Smart 2.0 belay device.
Key Specs
Suitable for
Climbing
Item number
2040-02550
Vertical breaking load
28 kN
Open breaking load
6 kN
Horizontal breaking load
11 kN
Dimensions (one size)
Height 119.00 mm, Width 77.00 mm, Gate opening 27.5 mm
Materials
Hardware Main Fabric 100% Aluminium
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