If you are looking for a way to mark out boundaries or indicate the position of holes, the Zoro Select 4521YG-200 Fluorescent Yellow Marking Flag is an excellent choice. The fluorescent yellow flag will ensure that your marking flag stands out against any background. It is made of vinyl and has a solid pattern. This marking flag has a height of 4 in., which makes it easy to see even from afar. The staff is made of steel wire, so it can be used as a taut line hitch knot without breaking. If you need to make sure that the markings on your site are visible, this Zoro Select Fluorescent Yellow Marking Flag will do the job nicely.