Mueller Co. manufactures several different small drilling machines for drilling holes from 7/16" to 2" in all types of pipe. Machines are available in hand or power operated models with a selection of drills and shell cutters for the type of pipe you are using. Small drilling machines are primarily used with service clamps and corporation stops to make service connections on mains under pressure. This method of making service connections is especially recommended for use where the main is too small, thin or weak to permit direct tapping. Mueller® small drilling machines can also be used to drill through any valve or fitting to which they can be attached.