DMM HB Alloy Offset Stopper

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Designed to protect irregular and flared cracks that regular nuts cannot, each DMM HB Alloy Offset stopper is asymmetrically tapered with a robust 12 kN strength rating.


  • Asymmetrical taper gives stable placements in offset cracks: offset taper protects cracks where normal nuts would not sit properly, such as flared cracks and peg scars
  • DMM recommends using these in conjunction with Wallnuts (not included) to find security in almost any crack for comprehensive all-season crack protection
  • Grooved faces improve security in irregular rock: a groove machined into their faces allows them to sit better in irregular placements and on highly featured rock
  • Allows placement in 2 orientations: Passive protection can be placed either side or face on, doubling the number of cracks any single piece can protect
  • Passive protection works in wet and icy conditions: Passive protection works by jamming in constrictions to prevent falls; it is suitable for use in all conditions
  • Nuts are mounted on wires set into a recess to reduce wear
  • Larger sizes have holes that reduce weight
  • Certification for all sizes: EN 12270:2013
  • Color-coded for easy size selection; colors are coordinated across passive and active protection, for quick selection of alternatives if your first choice doesn't fit
  • HB Alloy Offset #7: gold
  • HB Alloy Offset #8: blue
  • HB Alloy Offset #9: red
  • HB Alloy Offset #10: grey
  • HB Alloy Offset #11: turquoise


View all DMM Nuts

Technical Specs

Best Use

Rock Climbing


12 kilonewtons




7: 12.0 / 15.1 millimeters

8: 13.5 / 17.9 millimeters

9: 17.1 / 21.4 millimeters

10: 19.4 / 25.1 millimeters

11: 23.2 / 30.0 millimeters


7: 27 grams

8: 30 grams

9: 37 grams

10: 45 grams

11: 56 grams

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