heres a link on ebay for the tool i used to strap to concrete and steel pole,, looks pricey to me,,, u need buckles and whatever your going to attach (bracket),, hope this helps ,,
http://cgi.ebay.com/NEW-BAND-IT-G402-GIANT-STRAPPING-TOOL-BANDIT-1-1-1-4_W0QQitemZ7576587445QQcmdZViewItemQQptZBI_Packaging_Equipment?_trksid=p3286.m20.l1116