Starter solenoid switch with highly reliable contacts

A starter solenoid switch comprising:

• a first set of contacts including a first fixed contact and a first movable contact, said first set of contacts being disposed between a battery and a starter motor to make and break an electrical connection therebetween;
• and
• a second set of contacts including a second fixed contact and a second movable contact, said second set of contacts being disposed electrically parallel to said first set of contacts between the battery and the starter motor, said first and said second sets of contacts being so configured that the second movable contact makes contact with the second fixed contact to supply a lighter electric current to the starter motor before the first movable contact makes contact with the first fixed contact to supply a heavier electric current to the starter motor,
• wherein one of the second fixed contact and the second movable contact includes a first low-resistance portion at a first end thereof, a second low-resistance portion at a second end thereof that is opposite to the first end, and a high-resistance portion between the first and the second low-resistance portions which contains more carbon than both the first and the second low-resistance portions, and wherein the first low-resistance portion, the high-resistance portion, and the second low-resistance portion are serially disposed along a conducting path of electric current from the battery to the starter motor.