If you want to hang a picture without damaging your wall or sheet-rock, simply find a stud and pound an old sewing machine needle into the stud. These sewing machine needles are quite strong and will hold up quite a load if they are pounded in with a hammer. You can buy a pack of 4 new Sewing Machine Needles at Walmart for under $2. Now you know what to do with your old and dull machine needles. Don't throw them away!
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Keeping Sewing Machine Needles Handy