IMP's (Immaculate Marginal Protection) are 'brass' micro wires that have a regular taper. They are the ideal basis for any experienced leader's rack of micro gear.
When developing these nuts DMM gradually honed in on an alloy & a hardness that allowed both good bite & also a good resistance to shear forces
- this way the nuts lock into the rock well & also resist being pulled through the placement. Colour coding means you select the right nut first time, every time.