Abstract: A replacement structure of a pair of pliers contains: a first grip, a second grip, multiple screw bolts, and a first plier set and a second plier set which are alternatively rotatably connected with the first grip and the second grip. The first grip includes a first connection disc having multiple first orifices, and the second grip includes a second connection disc having multiple second orifices. The first plier set includes a first clamp arm and a second clamp arm, the first clamp arm has multiple third orifices, and the second clamp arm has multiple fourth orifices. Alternatively, when the second plier set is rotatably connected with the first grip and the second griping, the second plier set includes a third clamp arm and a fourth clamp arm, the third clamp arm has multiple fifth orifices, and the fourth clamp arm has multiple sixth orifices.

Abstract: A C-type pliers contains a body, two positioning members, and two working shafts. The body is comprises of two clamping handles pivoted together so as to form a pressing end and a working end, the two clamping handles have the two working shafts, and each clamping handle has a hole communicating with an orifice of the clamping handle. Each working shaft includes a recessed neck, and each positioning member includes a peg pivoted in the hole, and the peg has an arcuate fixing section driven by the peg which is rotated so as to insert into the orifice and to retain with the recessed neck of the each working shaft. The peg has a flat releasing section, such that when the peg is rotated so that the flat releasing section faces to the recessed neck of the each working shaft, the each working shaft is released from the peg.

Abstract: A C-type pliers contains a first elongated jaw including a first recess and a third recess, a second elongated jaw including a second recess and a fourth recess; a first handle further including a first notch, and a second handle including a second notch; a switching unit including a first cover, a second cover, a shaft extending outwardly from the second cover and used to drive the first cover and the second cover simultaneously, the shaft pivots the first handle, the second handle, the first elongated jaw, and the second elongated jaw; a switching unit also including a first retainer, a second retainer, when the first retainer retains in the first recess, the second retainer retains in the fourth recess simultaneously, and when the first retainer retains in the second recess, the second retainer retains in the third recess synchronously.

Abstract: A C-type pliers contains a body, two positioning members, and two working shafts. The body is comprises of two clamping handles pivoted together so as to form a pressing end and a working end, the two clamping handles have the two working shafts, and each clamping handle has a hole communicating with an orifice of the clamping handle. Each working shaft includes a recessed neck, and each positioning member includes a peg pivoted in the hole, and the peg has an arcuate fixing section driven by the peg which is rotated so as to insert into the orifice and to retain with the recessed neck of the each working shaft. The peg has a flat releasing section, such that when the peg is rotated so that the flat releasing section faces to the recessed neck of the each working shaft, the each working shaft is released from the peg.

Abstract: A C-type pliers contains a first elongated jaw including a first recess and a third recess, a second elongated jaw including a second recess and a fourth recess; a first handle further including a first notch, and a second handle including a second notch; a switching unit including a first cover, a second cover, a shaft extending outwardly from the second cover and used to drive the first cover and the second cover simultaneously, the shaft pivots the first handle, the second handle, the first elongated jaw, and the second elongated jaw; a switching unit also including a first retainer, a second retainer, when the first retainer retains in the first recess, the second retainer retains in the fourth recess simultaneously, and when the first retainer retains in the second recess, the second retainer retains in the third recess synchronously.

Abstract: The present invention provides for a folding utility knife comprising: a handle pivotally connected to a blade holding compartment, the handle comprises at least two side walls forming a space, the space of the handle designed to encase at least a portion of a blade holding compartment during a folded position, the blade holding compartment comprising an internal cavity leading to an opening at a front end of the blade holding compartment which allows a portion of a blade to protrude from the blade holding compartment, a rear end of the blade holding compartment is pivotally attached to one end of the handle; and a device that allows the blade to be in a first extended position during use and then be retracted to a second non-use position, the entire blade is situated within the internal cavity of the blade holding compartment during the second position.

Abstract: A cutting apparatus includes a sheath with an entrance, a slot, extrusion and withdrawal recesses, a positioning aperture and a discarding aperture. A handle is pivotally connected to the sheath. A first button is inserted through and movable along the slot between a position where bosses thereof are in the extrusion recesses and another position where the bosses are in the withdrawal recesses. A second button is inserted through the discarding aperture. A carrier is movably located in the sheath and connected to the first button. A jaw is connected to the carrier. Teeth of the jaw are moved out of cutouts of a blade when the jaw is pushed by the second button as the second button is pressed. A cassette can be inserted in the sheath so that a positioning block thereof can be inserted in the positioning aperture.

Abstract: A cutter includes a blade, a handle and a cassette. The handle includes a clipping unit including a space defined therein, at least one slot in communication with the space, and cutouts defined in an edge of the slot. The cassette includes a holder, a gate, a button and a key. The holder receives the blade except a tip. The holder is movably located in the space of the clipping unit. The gate is movably supported on the holder and used to keep the blade on the holder. The button is connected to the holder. The key is connected to the button and movable in and along the slot. The holder is retained in position relative to the clipping unit when the key is inserted in a selected one of the cutouts. The holder is movable relative to the clipping unit when the key is removed from the cutouts by pushing the button.

Abstract: A foldable knife includes a handle, a frame pivotally connected to the handle, a cartridge pivotally connected to the frame, a leaf spring attached to the frame, a blade-driving device, a blade-positioning element and a button. The frame includes a slot. The cartridge includes a slot through which the leaf spring reaches at least one blade when the cartridge is disposed in the frame. The blade-driving device includes a plate and a switch. The plate is in firm contact with the blade. The switch includes a portion located outside the frame and another portion inserted through the slot of the frame and connected to the plate. A blade-positioning element is movably connected to the frame. A button includes a portion for pushing the blade-positioning element and another portion inserted through the aperture of the frame for contact with a user's finger.

Abstract: A foldable knife includes a handle, a frame, a cartridge and a blade-driving device. A leaf spring is attached to the frame. The frame is connected to the handle so that it can be pivoted into and from the handle. The cartridge is connected to the frame so that it can be pivoted from the frame for receiving at least one blade and into the frame for feeding the blade. The leaf spring reaches the blade through a slot in the cartridge. The blade-driving device includes a plate, a switch and a connector. The plate is in firm contact with the blade. A primary portion of the switch is located outside the frame and a secondary portion of the switch is inserted into the frame through a slot. The connector connects the plate to the secondary portion of the switch so that the blade is movable via operating the switch.

Abstract: A foldable knife includes a handle, a frame pivotally connected to the handle, a cartridge pivotally connected to the frame, a leaf spring attached to the frame, a blade-driving device, a blade-positioning element and a button. The frame includes a slot. The cartridge includes a slot through which the leaf spring reaches at least one blade when the cartridge is disposed in the frame. The blade-driving device includes a plate and a switch. The plate is in firm contact with the blade. The switch includes a portion located outside the frame and another portion inserted through the slot of the frame and connected to the plate. A blade-positioning element is movably connected to the frame. A button includes a portion for pushing the blade-positioning element and another portion inserted through the aperture of the frame for contact with a user's finger.

Abstract: A knife-used handle set includes a handle, a holder and a lock. The handle includes a front portion for receiving a working blade, a rear portion and at least one blade-holding cavity defined in a side of the rear portion. The holder includes at least one cover for insertion in the blade-holding cavity, a blade-holding frame formed on an internal side of the cover and a groove defined in the blade-holding frame for receiving spare blades. The lock can lock the cover in the blade-storing cavity.

Abstract: A pair of gardening shears include a blade assembly including two blades, and a handle assembly pivotally mounted on the blade assembly and including a first handle and a second handle. Thus, the gardening shears have two blades each having two cutting portions having different shapes to perform different cutting functions, so that the gardening shears provide two different pruning actions so as to satisfy the user's practical requirements, thereby enhancing the versatility of the gardening shears.