Abstract: A tool fixing structure includes a snap ring, a fixing socket, an elastic member, a fixing rod, an outer socket, and a pressing socket. In such a manner, the screwdriver head is mounted on and detached from the tool fixing structure rapidly, easily and conveniently, thereby facilitating replacement of the screwdriver head, and thereby facilitating the user operating the screwdriver head. In addition, the pressing socket is modularized, and may be replaced according to the requirements, thereby enhancing the versatility of the tool fixing structure. Further, the snap ring, the outer socket and the pressing socket are made of an aluminum material, thereby decreasing the weight of the tool fixing structure.

Abstract: A tool coupling device includes a stem having a front channel for receiving ends of tool members, and having a lateral orifice communicating with the channel of the stem for receiving a ball. The tool members each has an aperture formed in one end for receiving the ball. A barrel is rotatably engaged onto the stem, and has a peripheral bulge for selectively forcing the ball into the aperture of the tool member. A spring may bias the peripheral bulge of the barrel to engage with the ball, and to force the ball into the aperture of the tool member and to lock the tool member to the stem.

Abstract: A tool fixing structure includes a snap ring, a fixing socket, an elastic member, a fixing rod, an outer socket, and a pressing socket. In such a manner, the screwdriver head is mounted on and detached from the tool fixing structure rapidly, easily and conveniently, thereby facilitating replacement of the screwdriver head, and thereby facilitating the user operating the screwdriver head. In addition, the pressing socket is modularized, and may be replaced according to the requirements, thereby enhancing the versatility of the tool fixing structure. Further, the snap ring, the outer socket and the pressing socket are made of an aluminum material, thereby decreasing the weight of the tool fixing structure.

Abstract: A grip structure for fixing an angled socket includes a first cover, a second cover, a first nut, and a second nut. The first cover and the second cover are combined with each other by the first nut and the second nut to encompass the outer periphery of the angled socket, so as to function a grip of the angled socket.

Abstract: A tool coupling device includes a stem having a front channel for receiving ends of tool members, and having a lateral orifice communicating with the channel of the stem for receiving a ball. The tool members each has an aperture formed in one end for receiving the ball. A barrel is rotatably engaged onto the stem, and has a peripheral bulge for selectively forcing the ball into the aperture of the tool member. A spring may bias the peripheral bulge of the barrel to engage with the ball, and to force the ball into the aperture of the tool member and to lock the tool member to the stem.

Abstract: A tool assembly includes a handle having a barrel, one ends of one or more tool members or of one or more shanks are engageable into detachably secured to the barrel. A sleeve is engaged onto the shank, an insert and one end of one or more saw blades are engaged into the sleeve, and one or more fasteners may detachably secure the saw blades and the insert and the insert to the shank. The tool members and/or the saw blades may be detachably and changeably secured to the barrel, and the saw blades may be changeably and solidly secured to the handle with the sleeve and the insert.