a tool comprises a first handle and a second handle , each handle extending from a gripping end portion to a working end portion , the first handle having first screw threads disposed circumferentially about an inner portion of a first through - hole at the working end portion thereof , the second handle having second screw threads disposed circumferentially about an inner portion of a second through - hole at the working end portion thereof , the first and second respective through - holes being disposed concentrically about a common axis of the working end portions . first and second screw locks preferably are disposed concentrically with the first and second respective through - holes , the first screw lock having a plurality of locking / unlocking screw threads for engaging the first screw threads of the first handle , the second screw lock having a plurality of locking / unlocking screw threads for engaging the second screw threads of the second handle . a locking clutch drive , disposed concentrically with the first and second respective through - holes , engages the first screw lock and the second screw lock . the first handle and the second handle are selectively operable at their gripping end portions by a user using a single hand to activate the first and second screw locks to lock the locking clutch drive for either clockwise rotation about the common axis , or counter - clockwise rotation about the common axis , or to release the locking clutch drive so that the handles can be rotated together about the common axis either the clockwise or counter - clockwise direction without rotation of the locking clutch drive .