Compatible with 8 inch in-wall/in-ceiling speakers Expedites home audio installation Easy for drywall installers to spot and cut around Anti-rust aluminum mounting wings for installation flexibility Thin perforated anti-rust aluminum wings can be trimmed to desired length 360° wing positioning for versatility Compatible with Earthquake Turn-N-Lock installation mechanisms Meets and exceeds all building codes Kit comes with two mounting ring brackets and four mounting wings Check speaker mounting specifications prior to installation if not using Earthquake speakers