This edging is called Sharp Point. The top sample is the edging and then double bed knitting. The bottom one is the edging and single bed knitting. My tension could have been a little bit tighter. I did not take the time to pin each point before steaming but I think you can see the idea of it. The article mentioned that this is good for a tuck stitch sweater because you are doing the edging on double bed to begin with. Double click on the directions and you should be able to see how this is done.
Passap Sharp Point Edging