Drilling machines cut or drill through the pipe wall via the corporation stop inserted into the service saddle while under pressure. They use Reed D series drills or hole saws. The DMBASE machine consists of the base unit which allows the customer to purchase separately individual corp adapters, drill or hole saw adapters, along with necessary drills or hole saws. With shell cutters and necessary adapters, these units can also be used on C-900 PVC pipe. DM2000110 is for use with Mueller 110 compression corporation stops. DM2000CCNPT is a combination of 3/4 and 1 AWWA CC thread and 1 1/2 and 2 NPT thread adapters.