Yo bomber, you have twin and half mixed up - twin you clip together, half you clip into different pieces. Anyone who is confused with all this twin/half/double-speak - see here for some pics that make it clear the difference in application of twin, half and single ropes:
http://www.mammut.ch/mammut/techinfos_ropes_subE.asp?id=920
in my book, doubles are just another name for half ropes |