What all do i need to take to machine shop?

re making a list of what you take in, if you have a set of number/letter punches then add something you'll know to each part (not on a machined face) and take pics. if you don't have them a simple centre punch and add 3/4/5/whatever dots to each part and again take pics. casting numbers are all well and good but you 'could' get the right casting number part back or shown to be bad that wasn't yours.
neil.