an assembly of closely spaced attachments , a method of manufacturing an assembly of closely spaced attachments and a method of applying interleaved attachments to objects . the assembly has alternating attachments having different types of heads and having different lengths . the shorter attachments may be subsequently stretched to engage the longer attachments . in this manner the spacing between attachments can be decreased . one result of using such an assembly with a conventional dispensing device is that the advancing mechanism of the device can advance attachments two at a time by only contacting a single position at every other attachment in the assembly .