Gardner Bender MSB-1540 Fiber Insulated Staples - Low Voltage

Yes. The MSB-1540 fiber insulated staples are made for low-voltage runs, including bell wire, thermostat wire, speaker wire and similar small-gauge cable. The fiber insulator sits between the steel staple and the conductor so the wire is cradled rather than crushed when the staple is driven home.

Wood only. The MSB-1540 is a steel staple with sharpened tips intended for driving into wood surfaces such as studs, joists, baseboard and framing. For drywall cavities or block and concrete you need a different fastening method, since there is nothing here for the legs to bite into.

Both protect the conductor; the difference is how. The MSB-1540 uses a fiber insert inside a steel staple, so the metal does the holding and the fiber takes the contact against the jacket. Plastic-bodied staples rely on the plastic saddle itself for both. Fiber inserts are the traditional choice for bell, thermostat and speaker wire being hand-driven into wood trim, where you want a thin steel leg that goes in without splitting the surface.

These are hand-driven staples. The MSB-1540 has sharpened tips so a hammer sets them into wood without pre-drilling. They are not magazine-loaded staples for a powered or manual stapler, so plan on driving them individually along the run.

The MSB-1540 comes as a packaged card of staples rather than loose pieces. The retail package measures 5 by 2.9 by 1.3 inches and weighs 1.45 ounces, so it hangs on a peg and drops easily into a service bag or tool pouch for low-voltage trim-out work.

Order by MPN MSB-1540. That is Gardner Bender's designation for the fiber insulated low-voltage staple, and it is the number to quote so you do not end up with a plastic-saddle NM cable staple instead.