Lower cost manufacturing is about working smarter. The Rush 250A Drill Sharpener is pre set for the aggressive drill post geometry of the Avenger Drill Line. While other cams are available for order, the preset cam on this Used Rush 250A translates to less than 1 Cent  per hole for pedditwist and Ocean Penetrator High Speed Steel Drill bits. Every bolt hole with a consumable cost extending tool life into the 10,000’s of hole before the need to replace.