Draper ST3/B Low Voltage Wires Wiring Cable Tacker
"Suitable for fastening low voltage wires, i.e. television/radio aerial cables and telephone leads. Use 10 and 14mm cable/wiring staples when tacking low voltage wiring cables. Can also be used as a traditional stapler with flat staples 8-12mm.
NB: Not to be used for fastening mains electricity cables.