Wrench and method for manufacturing the same

A wrench, including:

• a main body, including a head portion and a handle, the head portion having a receiving groove, the receiving groove having a driving member and a restriction member disposed therewithin, the restriction member being abutted against the driving member and the driving member being rotatable relative to the head portion;
• and
• a covering member, covering the receiving groove, including a through hole, one of the main body and the covering member having a first washer and a second washer integrally disposed thereon, the first washer and the second washer being abutted against and between the main body and the covering member;
• wherein the first washer and the second washer are integrally formed on the covering member by transfer molding, the first washer surrounds an edge around the through hole, and the second washer surrounds an outer peripheral edge of the covering member;
• wherein the driving member includes a rotating portion and a driving portion connected with each other, the driving portion penetrates through the through hole, a side of the rotating portion facing the covering member has a first annular groove, and the first washer is disposed within the first annular groove;
• wherein the first annular groove is adjacent to the driving portion, a side of an outer groove wall of the first annular groove close to the covering member has a chamfer disposed thereon, the first washer has an extending segment integrally disposed thereon, and the extending segment protrudes into a notch between the chamfer and the covering member;
• wherein the covering member is made of metal, and the first washer and the second washer are made of plastic or rubber;
• the first washer and the second washer are entirely received between the main body and the covering member when the covering member covers the receiving groove.