Originally posted by mplafleur
What exactly does "90 degrees angle of rotation" mean?
It's self-explanatory if you think about it. It means that once the initial torque is set,the fastener is "Rotated" an additional number of degrees. For example, the ratchet handle is facing the 12 O'clock position. You turn it to the 3 O'clock position...that's a 90 degree angle of rotation.