This 2pc set of Senco EA0140 replacement bits works with the Duraspin integrated auto-feed screw system. Made of durable steel, these (2) EA0140 #2 Phillips drive bits are ready to go when old bits break or wear out. Users can work with the assurance that they always have a backup from this 2pc set. These replacement bits work with Senco Duraspin screwdrivers such as DS300-AC amd DS275-18V.