Abstract: An extensible ratchet wrench has a main inner shaft with a ratchet head at one end, aligned lock pin holes along the shaft, and a lengthwise grooved guiding track disposed on the opposite side of the shaft. An outer sleeve is mounted telescopically and fits snugly about the main shaft for axial movement relative thereto. The proximal end of the sleeve is of reduced outside thickness with oppositely disposed holes for receiving both bearings, the holes being aligned with the shaft lock pin holes and guiding track. A locking collar disposed about the proximal end fits about the proximal end of the sleeve and has a spirally grooved interior at its distal end for receipt of a spring and internal ball bearing channels at its proximal end.