Patent ID: 7607372

Claim:
A method for making a wrench, comprising: a step of formation: making a mediate member, a movable jaw and an adjusting member, which are made of metal; a step of heat treatment: applying heat treatment to the mediate member, the movable jaw and the adjusting member to enhance rigidity; a step of surface treatment: cleaning respective surfaces of the mediate member, the movable jaw and the adjusting member, coating an anti-rusting layer on the mediate member, the movable jaw and the adjusting member, and a step of combination: putting the mediate member in a mold and making a body by way of injection, wherein a material making up the body is selected from nonmetallic material or non-iron material, the body including a handle and a head, the mediate member integrally combined with the head of the body, and then the movable jaw and the adjusting member being moveably inserted within the mediate member; wherein as the material making up the body is nonmetallic material, the nonmetallic material is selected from carbon fibers or glass fibers; wherein the material making up the body is non-iron material, the non-iron material is selected from aluminum alloy or zinc alloy.