I bought this some time ago and now I have a job to do I need to get the correct milling cutters. I want to try and clean up a car brake disc so what cutter will I need for it? I have the tool holder in the drive and the kit I have got takes either metric or inch shank sizes of cutter. It has either 3/8 or I/2 inch cotter or metric the largest of which is 16. I will add a photo of the kit later on today.