The wrench has a thumb switch, when operated, opens against a spring bias the pivotal ring portion around the axis pin attached to the fixed head portion of the wrench head portion, allowing a tube or pipe attached to the fastener to access the confines of the wrench head hexagonal inner profile via the said access channel now provided, the opening of the pivotal ring portion involves approximately 50% of the wrench head portion, the said pivotal ring portion encompassing approximately 50% of the wrench head inner profile. The corner profiles next to the swivel joints are scalloped such that when the pivotal ring is opened the scallops substantially align forming a passageway required for the abutting fastener drive corner to traverse through.