Steel Tension & Inner Rods to be used for window curtains, Shower curtains and inside closets. * Adjustable from 42" to 72"; Rod diameter is 1", the end cap diameter is 1-5/8". * Twist Tight For a Snug Installation. Non Slip Rubber Ends. * Bonus ceiling hook and conceals screws for reinforcement if used for window curtains or inside closets. * Heavy Steel Construction. Rust and Chip Proof.