Arlington FL430S-1 Cam-Light Box for Suspended Ceilings, 17 Cubic-inches, Metallic, 1-Pack Made in USA Use when installing fixtures and smoke detectors and more Approved for use with metal raceways, installs with 4.5-inch hole saw Mounting wings hold bracket securely against wall when screws are tightened Designed to install fixtures and more to a suspended ceiling panel - fast with a hole saw