A sophisticated addition to the world of installing screws, the reversible ratchet mechanism is absolutely silent. The handle holds six 1/4" bits plus one in the barrel (2 slot, 2 Phillips and 3 Robertson), In addition, the magnetic barrel will hold any 1/4" hex bit that is at least 1-3/8" long. The large 1-5/8" diameter grip is easy to hold comfortably – even when applying substantial torque. That’s a real plus.