| 摘要 |
A socket tool comprising: a socket base, 20, a socket clearance hole, 30, inside the socket base and surrounded by three first gripping surfaces, 21, three second gripping surfaces, 22, and six third gripping surfaces, 23, for development of edge planes around the socket clearance hole. The third gripping surface is located between the first gripping surface and the second gripping surface for circular permutation of first gripping surface, third gripping surface and second gripping surface. The first gripping surface is a cambered surface. The second gripping surface is an angled surface consisting of two adjoining planes, 221, which form an obtuse angle. A second embodiment of the socket tool differs from the first by having more than one first gripping surface and more than one second gripping surface where at least one of the first gripping surfaces is opposite to the second gripping surface. The first gripping surface may comprise an intrados on its cambered surface. |
