One hand operation design, include small and large jaw, for narrow space to disconnect button connectors.
Most of vehicle used this type of connectors for fuel line, the gerridae quick connector disconnect tool especially for disconnects fuel line, EVAP line and DEF fittings with tabs that must be depressed to disengage.
In the other one head, special design swivel jaws, as well as extra long jaw structure, for long and narrow space when your finger can not reach the connector.
