Abstract: A tool having an illumination function includes a tool body, and a light emitting device. The tool body includes a drive head having a first face provided with a mounting hole, and a second face provided with a protruding operation head located adjacent to the mounting hole. The light emitting device is mounted in the mounting hole and includes a light emitting member. The light emitting member is disposed in an inclined manner, and is directed toward the operation head of the drive head of the tool body. In addition, the light emitting member is not protruded outward from the second face of the drive head of the tool body.

Abstract: A tool having an illumination function includes a tool body, and a light emitting device. The tool body includes a drive head having a first face provided with a mounting hole, and a second face provided with a protruding operation head located adjacent to the mounting hole. The light emitting device is mounted in the mounting hole and includes a light emitting member. The light emitting member is disposed in an inclined manner, and is directed toward the operation head of the drive head of the tool body. In addition, the light emitting member is not protruded outward from the second face of the drive head of the tool body.

Abstract: A conductor tester including two contour-identical parts of a main unit and a remote unit is used to test and indicate present condition of conductors. Both the main and the remote units are formed at two ends with high and low raised portions that are provided with fastening means for the two units to detachably connect to each other to form a compact unit. The high and low raised portions are provided at side walls with notches that are electrically connected to internal circuits of the main and the remote units, and at inner walls between the high and low raised portions with light-emitting diodes.

Abstract: A roller-type ratchet device is used for a wrench which includes a driving head defining a receiving hole and a plurality of actuating recesses. The ratchet device includes a driving body secured in the receiving hole to rotate with the driving head, a follower secured between the driving body and the driving head and having a plurality of fixed portions each mounted in a respective one of the actuating recesses, a plurality of locking members each secured in a respective one of the fixed portions of the follower to move therewith, and each pressing the driving body, and a direction control knob pivotally mounted on the driving head and engaged with the follower for moving each of the locking members in the respective actuating recess between different positions.