My advise is spend the money and get a stainless steel set, 6" size. Digital or dial it is whatever you are comfortable with, I use dial. Faster to read digital but they need batteries. Mitutoyo is a quality brand but I think most stainless steel ones will do the job for you. Spend $30 or more on a set and you should get something you'll be happy with. Just don't go cheap or plastic.