Clips to hold potato chip bags are readily available, but cost about a buck each and seem to get lost very quickly. My wife had some old clothes hangers with clips she was about to throw away. I was inspired to make bag clips from them if it was possible. Each hanger has two clips.
The first step is to remove the clips from the main frame of the hanger. Since one side of the clips and the main frame of the hanger is plastic and cast as one piece, it is a simple matter to cut the clips off. You can use a hack saw, a saber saw, or even a red hot wire or nail. I use a high speed air rotary cutting tool. Don't cut too close and leave a little extra on the clips. They can be dressed down in the next step.
I grind off the excess and make it smooth. (This photo is 90º off, but I cannot turn it clockwise to the correct angle.)
There is always a little roughness sharp edges that needs some attention so I use a box cutter on those areas.
These work great, but they still disappear.
I have probably made 200 and they are liked by everyone who uses them.