Stepper specs. How to figure out?

Hi everyone,
Her is the today's puzzle.
I have 4 steppers that came with a kit I purchased long time ago
from US Robotics. Haven't used the kit. Now I have ordered a CNC
Ready Taig Mill and want to know if I can use these steppers with
it. The problem is there is no specs for the steppers except for the
following:
They are labeled as CY-Motors and have 5 wires that are labeled as :
supply, ground, step, direction and home. The power supply that came
with it is rated at 5A and outputs 12V.
There might be someone who purchased the same kit or knows about. Or
if someone knows how to find out torque, current and voltage limits.
TIA.
Khalique.