Abstract: The present invention is provides a fitting assembly for a hand tool with enhanced snapping capability, operation smoothness, and reduced manufacturing cost. The fitting assembly contains a body and one end of the body has a fitting member. The fitting member has a radial through channel connecting two opposing sides of the fitting member. Two steel balls and a conical spring in between are housed in the through channel. By simultaneously compressing the both ends of the conical spring through the steel balls on the fitting member, and as the smaller rings of the conical spring are squeezed into the larger rings to effectively reduce the length of the compressed conical spring and to align the steel balls' engagement direction and the axial direction of the conical spring, the fitting assembly provides enhanced snapping capability, operation smoothness in connection and detachment, and reduced manufacturing cost of the hand tool.

Abstract: A drive tool comprises a socket body, which has a drive end for coupling to a handle and a socket end for coupling to a bolt or nut. The drive end defines a drive opening for being engaged with a drive lug of the handle. The drive opening is defined by at least two sets of engagement surfaces, all sets of engagement surfaces being evenly distributed with respect to a central line of the socket body and being spaced at intervals of an angle, each set of engagement surfaces being configured to define a sub-opening that is matched with the drive lug of the handle so that the drive lug of the handle can be engaged with each set of engagement surfaces. Thereby, the handle can be coupled to the drive tool more easily so as to facilitate an operation.

Abstract: A knife sharpening device is disclosed. The device an elongated body with cornered edge on the surface thereof characterized in that at least one corner of the device is a cornered slot extended axially and the connection between the top end of the two walls of the cornered slot with the circumferential surface forms into a first sharpening edge and a second sharpening edge, and the first and the second sharpening edge are in contact with the edge of a knife.