Patent attributes
This present invention discloses a socket for wrenches, which comprises a main body having a proximal section, a distal section, and a central axis extending from proximal section to distal section. The main body has recess at inside on the proximal section with punctures on the recessed periphery and each puncture has a moving part mounted therethrough. A sleeve is in slide-fitting communication with the main body, which has an inner wall provided a plurality of push fronts thereon, each push front surface rises gradually by a plurality of continuous steps from one end to the other. When the sleeve is rotated of axially moved with respect to the main body, the gradual rising steps of the push fronts are pushing the moving parts toward the central axis to match with varieties of scales of work pieces.
