Century Drill and Tool. Best drill: 1/2″. Heat treated and tempered for file hard threads and longer useful life.
Century Drill & Tool 88710 10pc Screw Extractor & Drill Set
Century Drill & Tool 17916 Stubby Drill,
Century Drill & Tool 17906 Stubby Drill Bit,
Century Drill & Tool 17912 Stubby Drill Bit,
Century Drill & Tool 27200 Step Drill #1, 1/8" - 1/2"
Century Drill & Tool 17920 Stubby Drill Bit,
