This magnetic rod is one of those simple products that solves so many problems! It extends from 18 to 31.5 inches total (the rod itself goes from 16 to 29.3 inches) and the magnets are seriously strong - they grip securely to any smooth metal surface without slipping or sliding. Perfect for hanging curtains on metal doors with glass panels, using as a towel holder on your fridge, or as a calendar rod for classroom whiteboards. The stainless steel construction is rust-resistant and the magnets have rubber coating so they won't scratch surfaces. Installation takes seconds - no tools, no drilling, just position it where you want and the magnets do all the work. I've been using one on my metal laundry room door for a curtain and it hasn't budged in months. The 0.6 inch diameter is slim enough for most curtain grommets. If you need to hang flip calendars or anchor charts, just use 2-inch binder rings (not included) to hook them on. So versatile and well-made!