Abstract: An open-ended ratchet wrench characterized by arcuate fixed and pivoting jaw segments which receive round socket inserts of various design for achieving various drive functions. Typical inserts are box-end, socket drive and open-end inserts and the ratcheting function is adjusted for clockwise and counterclockwise operation by rotating the handle to manipulate a pair of pawls located in the fixed jaw segment. Removal and insertion of the inserts is achieved by manipulating a slide provided in cooperation with the handle to pivot the pivoting jaw segment with respect to the fixed jaw segment.