Patent ID: 7143669

Claim:
A wrench combination comprising: a wrench including a box end, the box end of the wrench comprising a polygonal inner periphery, an inner protrusion being formed on the polygonal inner periphery; a drive member comprising an engaging portion removably mounted in the box end of the wrench and engaged with the polygonal inner periphery, the drive member further including an end located outside the box end of the wrench, the engaging portion including a retaining section having an outer diameter greater than a diameter of a hole delimited by the inner protrusion, the retaining section abutting against an end face of the inner protrusion when the engaging portion is mounted in the box end of the wrench; and a retaining member mounted on the drive member and including an outer diameter greater than the diameter of the hole delimited by the inner protrusion, the retaining member abutting against another end face of the inner protrusion when the engaging portion is mounted in the box end of the wrench, the retaining member being compressible to be smaller than the diameter of the hole delimited by the inner protrusion.