Contains (25) Bridle Wiring Rings | Ring Inner Diameter: 3 Inches Easy, efficient and economical cable management! Designed for low-voltage cable such as phone lines, Ethernet, and coaxial cable Discretely secure bundled cable to wood surfaces such as walls, attics & ceilings Constructed with sturdy, zinc-plated steel Wood screw-style shaft threads Strong and simple! The Skywalker Wiring Wood Screen Ring are designed for use with wood and made to get the job done. They come in a handy pack of 25 and secure bundled cable like a dream.