Windshield wipers!!!

[eighteenninetytwo]

i know NOTHING about windshield wipers on any form of vehicle - not somethign Ive ever had to deal with. The wipers i took off the blazer are ineffective and missing springs. They fit onto a small post (i think it's called a drive post) that actually turns left and right with the motor. Questions:
1. is this drive post standard for every vehicle....and
2. Is the post a standard size??

in effect can i go to o'Reilly or Pep Boys boys and buy new wiper assemblies? If so what have others used?