I saw this idea on a post at crossfit. It is a GREAT idea. Not only are they strong, they fit exactly and are CHEAP. Metal collars are getting either real expensive or impossible to find. This should be a great alternative.
My blog is going to be a bit of an addition to my site Fightraining. My main how to make articles will remain there and be added to there. I'm hoping the blog will allow me to update things quicker. The blog will be mainly about interesting workout stuff I find on the web, brief descriptions of new homemade projects, my fight with diabetes, and occasionally other interesting things I find on the web.