I had my tires rotated and balanced the other day and i watched the guys run the lug nuts down using an impact wrench. They just kept hammering on them. I then told them after they finished that i always watch to see if the tire place uses a torque wrench to torque down lug nuts and that tells me if i will give that place return business. THey informed me that they use torque sticks. Each color represents a different torque. Should i trust those or should i re-torque my lug nuts? I've never seen these things.