in case you are insure about if you have a used needle or notfourforty wrote:Personally, If I had a double ended needle, I might always wonder if I had flipped it over yet, or am I re-using the end that I don't want to use again?
Of course, our fellow member's soon to be made "patented" needles could have a color coding on one end perhaps! Then you could tell side 1 from side 2!
take it to a bright light and roll the needle between index finger and thumb infront of your face if you see a little flash comming from the needle than its used because it has a flat side that reflects light
and no flash good needle