Fractional Die 1/2-20 National Fine. Century Drill and Tool. Heat treated and tempered for file hard threads and longer useful life.
Century Drill Tool 96107 Fractional Die 14-20 National Standard Thread
Century 25416 Century Drill 25416 Charger Drill Bit 135° 1/4 X 4"
Century Drill & Tool 17916 Stubby Drill,
Century Drill & Tool 27200 Step Drill #1, 1/8" - 1/2"
Century Drill & Tool 17920 Stubby Drill Bit,
Century Drill & Tool 27203 Step Drill #4, 3/16" - 7/8"
