Abstract: A flexible socket extension includes two connectors disposed in two ends of a flexible housing, and a number of torque transmitting elements received in the flexible housing and coupled between the connectors. One of the torque transmitting elements includes a neck and a tongue which has a width greater than that of the neck. The other torque transmitting element includes a lateral groove for receiving the tongue, and having two juts extended into the lateral groove, for engaging with the tongue and for rotatably retaining the torque transmitting elements together.

Abstract: A flexible socket extension includes two connectors disposed in two ends of a flexible housing, and a number of torque transmitting elements received in the flexible housing and coupled between the connectors. One of the torque transmitting elements includes a neck and a tongue which has a width greater than that of the neck. The other torque transmitting element includes a lateral groove for receiving the tongue, and having two juts extended into the lateral groove, for engaging with the tongue and for rotatably retaining the torque transmitting elements together.

Abstract: A speed reducer in a portable electric tool is specifically referred to a powered tool for automotive repair with lighter weight and 12V direct current motor. The speed reducer comprises a casing to be attached by the 12V direct current motor, an end planetary gear set driven by the motor, and an output shaft rotary attached to the casing and driven by the planetary gear set. The speed reducer is characterized in that the output shaft at an end thereof provides an internal gear disk with internal circular teeth to mesh with two oppositely parallel positioned over pins provided on each gear of end planetary gear set. Hence, the output shaft can be driven to rotate by the planetary gear set instead of gears of the planetary gear set directly meshing with the output shaft. In this way, the disadvantage of loosening apart easily resided in the prior art can be corrected and the torque of output shaft can be increased greatly for saving the effort of user.