DMM I.M.P. Brass
When the going turns tricky and the only cracks you can find are too narrow for conventional nuts, it’s time to pull out the micro wires. It’s always better to have something, however small, between you and the ground.
IMP stands for Immaculate Marginal Protection – a neat little acronym, but one which fits perfectly.
IMP runners can never be considered as ‘trainstoppers’, at least not in the same way that a well placed Wallnut might be. But they can give unexpected holding power in marginal placements, particularly if you cluster the placements and equalize them so that the load is spread evenly.
We’ve given them a special aluminium swage which holds the wires parallel but allows one wire to slide. This means the nut is loaded more evenly on both sides. The swage is color coded too, so you’ll always pick the right one.
Obviously these are quite a specialist nut, but anybody pushing into the extreme grades should consider them as an essential addition to their rack.
“These micro wires have got me out of some pretty scary situations. Even the larger sizes are surprisingly useful. If you get a wide but shallow placement a 4 or a 5 slots in perfectly when a normal wire would just be hanging half out.”