A hand tool provided with a first handle, a second handle, a first working portion, a second working portion and a working portion connecting mechanism. The first handle is fixedly connected to the first working portion, the second handle is pivotably connected to the second working portion, and the second working portion is connected to the first working portion through the working portion connecting mechanism, the second working portion has a first position and a second position, and the working portion connecting mechanism causes the second working portion to be moved from the first position to the second position when the second handle is moved from away from the first handle to closer to the first handle. The first position is the position where the second working portion is located away from the first working portion, and the second working portion is rotated and translated relative to the first working portion when the second working portion is in the second position. The hand tool can provide a greater clamping force, helping to further save labor.

A hand tool provided with a first handle, a second handle, a first working portion, a second working portion and a working portion connecting mechanism. The first handle is fixedly connected to the first working portion, the second handle is pivotably connected to the second working portion, and the second working portion is connected to the first working portion through the working portion connecting mechanism, the second working portion has a first position and a second position, and the working portion connecting mechanism causes the second working portion to be moved from the first position to the second position when the second handle is moved from away from the first handle to closer to the first handle. The first position is the position where the second working portion is located away from the first working portion, and the second working portion is rotated and translated relative to the first working portion when the second working portion is in the second position. The hand tool can provide a greater clamping force, helping to further save labor.

The present invention provides an open-close device, including a first member, a second member, a third member and a fourth member; the second member is rotatably connected to the first member, the third member is rotatably connected to the first member, the fourth member is rotatably connected to the second member and rotatably connected to the third member, the open-close device further includes an angle adjusting device which is provided at a joint between the third member and the first member, for adjusting the bending angle of the third member with respect to the first member.

The present invention provides an open-close device, including a first member, a second member, a third member and a fourth member; the second member is rotatably connected to the first member, the third member is rotatably connected to the first member, the fourth member is rotatably connected to the second member and rotatably connected to the third member, the open-close device further includes an angle adjusting device which is provided at a joint between the third member and the first member, for adjusting the bending angle of the third member with respect to the first member.

Tools for use in installing and removing V-clamps are disclosed. One embodiment of a V-clamp tool includes a spreader mechanism, an actuator cable, and a plier element mechanically coupled so as to expand or contract hooks shaped to engage corresponding V-clamp brackets to widen or shrink the V-clamp opening for installation or removal.

The present invention provides an open-close device, including a first member, a second member, a third member and a fourth member; the second member is rotatably connected to the first member, the third member is rotatably connected to the first member, the fourth member is rotatably connected to the second member and rotatably connected to the third member; the open-close device further includes an angle adjusting device which is provided at a joint between the third member and the first member, for adjusting the bending angle of the third member with respect to the first member.

The present invention provides an open-close device, including a first member, a second member, a third member and a fourth member; the second member is rotatably connected to the first member, the third member is rotatably connected to the first member, the fourth member is rotatably connected to the second member and rotatably connected to the third member; the open-close device further includes an angle adjusting device which is provided at a joint between the third member and the first member, for adjusting the bending angle of the third member with respect to the first member.

A spring clamp for assembly fixturing includes a retainer that limits a minimum distance between jaws of the spring clamp when the spring clamp is in a relaxed state.

A spring clamp for assembly fixturing includes a retainer that limits a minimum distance between jaws of the spring clamp when the spring clamp is in a relaxed state.

The present invention discloses a ratchet clamp comprising a first clamping arm and a second clamping arm which are pivotally connected with each other via a connecting shaft so as to be opened and closed relative to each other, a ratchet assembly, a swing assembly and a control assembly provided between the first clamping arm and the second clamping arm; the ratchet toothed assembly has a plurality of first ratchet teeth and a plurality of second ratchet teeth which are juxtaposed and are misaligned with each other; the swing assembly and the ratchet toothed assembly are moved away from or towards each other with the connecting shaft as the axial center of rotation; a latch member of the control assembly has at least a first pawl and at least a second pawl, a wrench member of the control assembly is used for toggling the latch member to be moved, the first pawls and the second pawls are respectively engaged with the corresponding first ratchet teeth and second ratchet teeth when the latch member is moved to an engaged position, and the first pawls and the second pawls are respectively moved away from the corresponding first ratchet teeth and the second ratchet teeth when the latch member is moved to a released position. With the misaligned ratchet tooth design, the tooth profile may not be reduced, thereby increasing the structural strength, so that the overall clamping force is greatly enhanced.