DMM has nearly three decades of experience in making fine quality climbing equipment. It has taken continuous hardwork combined with investment in new technologies for DMM to achieve its position as a world leader in the design and production of climbing and mountaineering hardware. IMPs (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. Set of 5 nuts, sizes 1-5