The Pro Power SPC35203 is a 20A, 250VAC single pole, center off, three-position toggle switch. It is constructed with a metal toggle handle and a single-piece black plastic body for a durable, reliable operation. The SPC35203 has four 6.3mm quick-connect spade terminals and one 6.3mm Torx drive terminal. The three switch positions are OFF-ON-EXT, meaning that the switch can be in an OFF position, an ON position without the EXT line being activated, or an ON position with the EXT line being activated. The switch is designed for a wide variety of applications from motor speed control to power distribution.