was to look at the hardware end of the system. He decided to fit a pulley roller into the apex of a biner. A simple, but extremely effective solution to an age old problem. In practice, a Revolver placed at changes of direction on a long pitch can prevent that heavy harness feeling.
The story doesn’t end there though: during the prototype phase Fred struggled to get the weight of the biner down to an acceptable level. However this in itself prompted yet another innovation: the I-Beam construction, a method by which we can significantly reduce the weight of a biner yet maintain its strength. This has since been rolled out to all of the new DMM biner designs.
The Revolver also has a further interesting function – it can be used in rescue situations as a pulley. And for added security, there are locking versions available.
We’re not suggesting that you should climb exclusively on Revolver quickdraws, far from it, but it does make sense to have at least a couple on your rack.