Abstract: A method for making a dust-proof ratchet wrench includes the following steps of: previously formed an embryo of the dust-proof ring, wherein the POM is previously formed a tube-shaped embryo of the dust-proof ring by injection molding; processing a shank of the dust-proof ratchet, wherein a through hole is defined in one end of the shank, a series of teeth is formed on the inner periphery of the through hole and two annular grooves are respectively defined in two opposite sides of the shank; finishing the dust-proof ring, wherein the tube-shaped embryo of the dust-proof ring is cut to form a ring structure according to the diameter of the annular groove and the diameter of the tool for processing the annular groove; and assembling, wherein each annular groove has a dust-proof ring mounted therein, a switch, a direction select device and a drive device sequentially mounted onto the shank.

Abstract: A dust-proof ratchet wrench includes a shank having a through hole defined in one end thereof and two annular grooves respectively defined in two opposite side of shank, wherein the two annular grooves co-axially correspond to the through hole and each annular has a dust-proof ring received therein. A drive device is partially received in the through hole in the shank and abuts a corresponding one of the two dust-proof rings. A direction select device is received in the through hole in shank and a switch rotatably and partially received in the through hole in the shank for driving the direction select device to change the operating direction of the ratchet wrench.