Gardner Bender MSW-1540 Fiber Insulated Staples  Inch., Secures Low-Voltage / Bell Wire / Speaker / Telephone & Thermostat, Splinter Free, 40 Pk., White Insulates and protects wire This staple secures and protects non-metallic (NM), BX, MC, AC and UF Cable. Fiber insulated steel staples Sharp tips for easy driving For low voltage bell, thermostat and telephone wiring White 3/16-Inch 40 per card