DUO Stainless Steel Tension Rod Series is ideal for both Indoor & Outdoor use. .This Joiner is used to connect multiple Versailles SS Series rods together to create a longer expanse. DUO Stainless Steel Rods can be joined together with an optional ceiling mount bracket to create a rod of any length. 1in diameter stainless steel rod. Feature a heavy duty spring and rubber insets in end cap. Rods can mount with spring tension for easy installation or permanently with an invisible screw in the end cap. Use the joiner as a ceiling mount bracket for extra heavy curtains. Join Duo Tension ad infinitum! Span any length， Indoors and Outdoors!