SMC Locking D Carabiner

Versatile, High Strength, Alloy Carabiner

The enduring design of the SMC Locking D has become the standard in rock climbing, mountaineering and rescue applications as well as in an ever increasing base of industrial applications. This is due to its high strength, light weight, wide gate opening and functional versatility.

Features of the SMC Aluminium Locking D include:-
  • The nut of the locking sleeve engages on the gate – not on the carabiner frame – this helps prevent jamming or vibrating loose.
  • The small offset D frame fits easily in the hand and aligns well with gear such as pulleys, Protraxions etc.
  • The narrow bar stock used to create the frame means the carabiner is compatible with all devices as well as Australian style bolt hangers.
  • It is ideal for mountain rescue & rope access use.
  • That it is made in the USA and individually inspected by the manufacturer.
So, What’s Special About the SMC Locking D?

Yes, this carabiner has been around FOREVER, but doesn’t that just prove that if something is good, don’t mess with it. This is a simple, well designed tool that works. The price is good too which adds to the point score.


Please note that adequate training and judgment are needed to reduce the risks inherent in the use of this equipment. It is the responsibility of the purchaser to ensure that the user is adequately and competently trained in the use of this product. We strongly advise that you do not use any carabiner without first undertaking appropriate training.



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Gate opening: 21mm


High quality aluminium

111mm x 65mm with a 21mm gate opening


27kN long axis; 7kN short axis; 7kN Open Gate

Manufacturer’s Product Code

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