B-Line Eaton series data and low support fasteners, 360° rotation, Cable to t-bar fastener, Ceiling mount, 3/4" Hook, 1 J-hook, Pre-galvanized, Load

It's a cable-to-t-bar fastener, so it clips directly onto the T-bar of a suspended ceiling grid, no drilling, no anchors, no threaded rod. The hook then carries the cable off that grid attachment. That makes it a ceiling mount part specifically for grid ceilings; on a hard deck or open structure you need a different attachment style (beam clamp, rod, or screw-on base).

It lets you aim the hook independently of how the fastener sits on the T-bar. On a run that crosses the grid at an angle or turns a corner, you set the clip on the bar once and then swing the hook to line up with the cable path, so the bundle stays straight instead of getting pulled sideways at each support point.

The body is steel with a pre-galvanized finish, which handles normal interior and above-ceiling conditions. It's UL/CUL listed. For wet locations or corrosive environments, a stainless or hot-dip galvanized support is the better call than pre-galvanized.

These are datacomm and low voltage supports. Keep line voltage out of them and maintain separation between power and communications cable. If a run needs both, support them on separate hooks.