The Sun Zero 5/8" Room Darkening Tension Rod installs easily inside your window frame with no tools required and is designed to save energy, block light, and reduce noise. The telescoping steel rod is adjustable from 28-60" to fit a variety of window sizes and has a black finish that adds a touch of style. It features camlock tension technology, allowing for easy installation with no tools required. Use in your kitchen, bedroom, dining room, or living room to hang light to medium weight curtains. It is ideal for hanging curtains with grommets, back tabs, or pockets, but can also be used with tab tops or clip rings. Pair with Sun Zero curtain panels (sold separately) to maximize energy saving, light blocking, and noise reducing features. To install, simply slide the adjustable rod to fit inside your window casing and twist the rod to lock in place.