I hate those clips. Too big and not enough clamp power.
Best thing is binder clips.
At a tag sale I found a bucket of vintage spring clothespins I got for a quarter. I surmise they were made by the Forster Co. in Maine....to heck with the Chinese junk you find today.
This is what I use. They work great.
http://www.amazon.com/Office-Depot-Brand-Magnetic-Silver/dp/B00F63R0S6/ref=sr_1_17?s=office-products&ie=UTF8&qid=1416588076&sr=1-17&keywords=magnetic+clips
Ha. That's what I use.