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Shop Rock + Run Brand. Drawing on our decades of climbing, running, training and general experience in the mountains, we continue to develop and expand this collection of core products directly made by Rock + Run or sourced and branded by Rock + Run. 

Black Diamond

Black Diamond Micro Stoppers


The Black Diamond Micro Stoppers offer versatile thin crack protection for free climbers and aid climbers.

Trapezoidal in shape, these micro climbing nuts have a subtle curve allowing for placements in almost parallel cracks, but can still work around crystals and other minor lumps, bumps and irregularities. Each Micro Stopper is equipped with a durable, galvanised steel cable.


  • Copper/iron mix in heads provides bite in thin placements
  • Patented swage is stronger, more flexible and less prone to fraying

*Sizes 1 and 2 are for direct aid climbing only


Number Colour Size - Depth x Long Edge (mm) Strength (kN) Weight (g)
1 Grey 3.7 x 5.1 2 4
2 Yellow 4.6 x 6.5 3 7
3 Green 5.1 x 7.5 5 10
4 Blue 5.9 x 8.4 6 13
5 White 7.4 x 9.4 6 15
6 Red 8.8 x 10.04 8 21