SparkFun COM-09609 SPDT Slide Switch
This is a simple SPDT slide switch - great for use as an ON/OFF button, or just as a general control switch. The pins are spaced by 0.1", however they are incredibly thin making breadboard use not recommended. The switch is rated for 0.3A at 50VDC.
This switch is just a bit smaller than our popular SPDT Mini Power Switch, but uses the same pin spacing. Being smaller takes up less PCB space (good!), but it does make it a bit harder to hit and flip easily.