Our offered Locating Pin can be used for both internal and external workpiece locations. For the internal location, the diameter of the pin must match the size of the locating hole. These locators are widely available and come in a variety of regular sizes as well as customized diameters. For the external location, the size of the Locating Pin is not as critical. The ideal option in this case is a conventional pin size that is robust enough to withstand machining forces.