RB-421 Servo 2 pack degrees

Got the RB-421 servo 2 pack, and they work great but I can only get them to spin 180 degrees. I am using the built in library of the arduino IDE.
My question is are they 360 degree servos and I am only limited by software, or are they only 180 degree servos?

:confused: E…they are only 180 degree servos …

ok, thanks. that saves me from banging my head against the desk trying to figure out why they dont go all the way around. :laughing:

if you want a 360 degrees servo for robot , that i recommend this one :http://www.openservo.com :laughing: