B-Line Eaton series data and low support fasteners, Cable to floor support fastener, Pipe mount, 1" Diameter rod, 1-5/16" Hook, 1 J-hook, Pre-galvani

The hook opening on the BCH21-L1410 measures 1.31 in (1-5/16 in), which is the small end of the J-hook range and suits modest low voltage and datacomm bundles. If you are pulling a dense bundle of Cat6 that will fill more than that opening, step up to a larger hook size rather than overfilling this one, since crowding a hook is what deforms cable jackets and kills the bend radius.

It's a pipe mount fastener, so it clamps onto a 1 in diameter rod or pipe rather than a beam flange, a threaded rod nut, or a stud. If your overhead support is all-thread or structural steel, this is not the right attachment style; pick the B-Line hanger built for that mounting method instead.

Pre-galvanized steel is a dry-interior finish. It holds up fine in conditioned ceiling space, plenums, telecom rooms and back-of-house areas, but it is not the finish to run outdoors, in a wash-down area, or anywhere with standing moisture or corrosive atmosphere. For those, specify a hot-dip galvanized or stainless support.

Yes, it is UL/CUL listed, which covers it for use in the US and Canada. That listing is what an inspector or institutional spec writer normally wants to see on low voltage cable support in a commercial ceiling.

That's exactly what they're for. B-Line datacomm and low voltage support fasteners carry communications and low voltage cable in open runs, spaced along the route, so you avoid tray or conduit where code and the spec allow it. They are not a substitute for raceway on power circuits - this one supports cable to a pipe or rod, nothing more.

The fastener ships as a complete pipe-mount unit with the single J-hook attached, so nothing extra is needed to get it onto a 1 in rod or pipe. What you do have to supply is the pipe or rod itself and whatever anchors that support back to the structure.