Patent ID: 7174810

Claim:
A selective one-way tool comprising: a handle comprising a mandrel defining a slot; a transmission positioned in the slot, the transmission comprising a first pawl, a second pawl and a spring compressed between the first and second pawls; a bit-engaging element installed on the mandrel for engagement with both of the first and second pawls in a non-directional mode, for engagement with only the first pawl in a first directional mode, and for engagement with only the second pawl in the second directional mode; and a mode-switching ring rotationally installed on the mandrel, the mode-switching ring comprising two ribs on an internal side for pushing the second pawl into the slot in the first directional mode, for pushing the first pawl into the slot in the second directional mode, and for not pushing the first and second pawls into the slot in the non-directional mode.