BOX WRENCH AND SOCKET WRENCH HAVING STOPPER PORTIONS FOR PREVENTING SLIPPAGE ALONG A NUT OR A BOLT HEAD

摘要

A wrench (10) for rotating a fastener having a number of corners on a periphery thereof and method of making same is disclosed. The wrench (10) includes a gripping member (12) having an opening defined by an inner surface (24) complimentary to the periphery of the fastener whereby the fastener may be axially received by the gripping member (12). The inner surface (24) defines the plurality of circumferentially spaced shoulder portions (30) wherein alternating shoulder portions (30) engage a corresponding corner of the fastener. The shoulder portions (30) define areas (34) therebetween. Stopper portions (36) are located in alternating areas between shoulder portions (30). The wrench (10) has a first angular position where the stopper portions (36) engage an upper surface of the fastener for restricting the passage of the fastener therethrough and a second angular position where the stopper portions (36) do not engage the upper surface of the fastener thereby permitting the passage of the fastener therethrough.