Beautiful heavy duty stitch markers / safety pins.  These stitch markers are perfect for worsted weight and chunky yarns.  I find these to fit perfectly with my 3mm and 5mm bobbiny cords as well as my mini and medium weight bobilon cakes.  They have a semi-blunt end and they do not rip or catch the yarn.  The set comes with 4 markers.
 
These stitch markers come in three colors;
Soft Gold
Gold
Rose Gold
 
They measure 3/4" in length