The Philmore Mfg. 30-013 ON-ON H.D. Bat Handle Toggle Switch has a current rating of 20A at 125V AC, 10A at 277V AC, and 3/4 HP at 125-250V AC. The initial contact resistance is a maximum of 50m Ohm, with a minimum insulation resistance of 100 Meg ohm at 500V DC. It has a dielectric strength of 1000V AC at 50/60 Hz for 1 minute. The switch's contact material is brass with a bright nickel plate, while the terminal material is also brass. It features a screw action ON-ON actuator and a metal mounting hole with a diameter of 0.50".