Abstract: This present invention is an improved adaptor sleeve which includes a hollow sleeve having a first bore opening at its first end for receiving a coupling end of a handle and a second bore opening at its second end which has a hexagonal cross section adapted for receiving the head of a tool or screw driver. A U-shaped spring clamp plate is received in the second bore opening, and the U-shaped spring clamp plate is in an arrangement adapted for clamping and grasping the head of a tool or screw driver so that the head of a tool or screw driver cannot easily loosen off or rotate in the hollow sleeve during practical use.

Abstract: A ratchet wrench which includes a handle connected to a housing having a plurality of inwardly projecting teeth on its inner side, and a torgue transmitting member provided in the housing which has a shaft extending therefrom. The cylindrical body has as axial groove opening at its peripheral surface, a bore extending radially outward to communicate with the groove, and a protrusion means received in the bore and biassed radially. The groove is confined by two diverging surfaces, and two converging surfaces extending from the diverging surfaces respectively. A pawl is axially disposed in the groove. It has a first longitudinal tapered end portion to engage with the teeth, a second longitudinal opposite end portion to engage with corners of the groove, and a recess in the second end portion for engaging with the protrusion means. The second end portion is movable between two corners of the groove to change the engaging position of the first end portion with respect to teeth.