Nelson, you lost me there. Are you talking about gage pins, perhaps? Sets are available from 0.0110 to 1.0000, by thousandths, with choices of tolerance class, and "direction". Typical shop sets are either +0.0002/-0.0000 or -0.0002/+0.0000. The pins are about 2.000 long. These are hardened, ground, and lapped general purpose pins. Dedicated go/no go plugs can also be had in pretty much any size you want. Like thread gages, except plain cylinders.