Abstract: A quick-release socket adapter for a T-shape socket wrench is capable of overcoming the inconveniences caused in operation by the excessive tight or loose engagements of the conventional T-shape socket wrench with a socket, which is an integral structure composed of a slide rod and a slide head. In operation, a ball defined in the slide head can be projected outward or retracted in the slide head just by rotating or moving the slide rod, so as to achieve an effective quick release or engagement of the T-shape socket wrench with the socket.

Abstract: A wrench includes a box end which has an elongated space defined therein and the space is defined by a periphery which includes two long sides and two short sides which are connected between the two long sides. The periphery is composed of two identical portions which are symmetrical about an axis P which passes through a mediate point on one long side and a mediate point on the other second long side. Each portion has three engaging surfaces for contacting three sides of a hexagonal object and three recesses for allowing corners of the hexagonal object being received during rotation of the box end. The box end may tighten or loosen the object without removing the box end from the object by engaging the object with either one of the two identical portions of the periphery.