B-Line Eaton series data and low support fasteners, W6 series attaches to 3/8" plain or threaded rod, Cable to wire and rod fastener, Cable mount, 1-

The W6 attachment clamps onto 3/8 inch rod, either plain or threaded. That makes it a drop-rod pickup for cable runs where you already have trapeze or all-thread hanging from the deck. It is a cable to wire and rod fastener, so the same family also picks up existing support wire.

The hook opening on the BCH21-W6 is 1.31 in (1-5/16 inch), and there is one hook per fastener. For low voltage and datacomm runs that is a single bundle cradle; larger bundles need a bigger hook size or additional hooks along the run.

Yes, it carries a UL/CUL listing. That matters on datacomm and low voltage installs in commercial buildings where the inspector wants listed support hardware rather than field-improvised hangers.

It is steel with a pre-galvanized finish, which is the standard indoor above-ceiling spec. Pre-galvanized is a mill coating, not a hot-dip, so for corrosive or genuinely wet exterior locations look at a heavier coated or stainless support instead.

Use the W6 style when the support is already in the air: existing 3/8 inch all-thread, trapeze rod, or support wire. It clamps on with no drilling and no shooting into deck. If you have bare structure with nothing hanging yet, you want a beam clamp, deck-mount, or threaded-stud version instead, and then run the cable in the same 1-5/16 inch hook size.

Overall it measures 4.642 in height, 1.994 in length/depth and 1.62 in width. Allow for the full height when you are working in a tight ceiling cavity, since the hook sits off the rod rather than in line with it. Each piece weighs .177 lb.