NOT a typical tension rod that you twist to elongate/shorten.  Read the instructions very carefully.  This rod is designed to be elongated to the desired length and then twisted only 2-3 times to "lock" into place.  After receiving this rod and trying to  twist to extend it like a standard tension rod, it permanently fused together and was stuck beyond repair.  I had to purchase a different tension rod from another vendor.  Other than the confusing directions, this rod seems extremely sturdy.