A cutting tool includes first and second blades attached to each other by a joint, and first and second handles. A first inlay having a protruding end protrudes into a hole in the first blade. A shaft has a first end joined to the protruding end of the first inlay, and has a second end with at least one transverse shoulder. A second inlay has a protruding end protruding into a hole in the second blade and a hole receives the second end of the shaft, and an engaging surface engages with the shoulder of the shaft. The hole of the second inlay has a shape and width allowing the second end of the shaft with the shoulder to pass into the hole in a release position, but prevents the shaft and shoulder from passing through the hole when the shaft and second inlay are not in the release position.

A cutting tool includes first and second blades attached to each other by a joint, and first and second handles. A first inlay having a protruding end protrudes into a hole in the first blade. A shaft has a first end joined to the protruding end of the first inlay, and has a second end with at least one transverse shoulder. A second inlay has a protruding end protruding into a hole in the second blade and a hole receives the second end of the shaft, and an engaging surface engages with the shoulder of the shaft. The hole of the second inlay has a shape and width allowing the second end of the shaft with the shoulder to pass into the hole in a release position, but prevents the shaft and shoulder from passing through the hole when the shaft and second inlay are not in the release position.

A pipe cutting tool includes a tool body having a handle portion and a blade carrying portion with a tool body hole extending through the blade carrying portion. The pipe cutting tool includes a blade carriage coupled to the tool body and rotatable around the tool body hole and a blade which engages with the blade carriage. The pipe cutting tool includes at least one retaining plate coupled to the blade carriage and rotatable about the tool body hole. The pipe cutting tool includes a pin which is configured to removably extend through the tool body hole and a hole formed through the blade carriage. The tool body includes a boss feature which engages with the retaining plate to hold the blade carriage when the pin is removed from the pipe cutting tool.

A pipe cutting tool includes a tool body having a handle portion and a blade carrying portion with a tool body hole extending through the blade carrying portion. The pipe cutting tool includes a blade carriage coupled to the tool body and rotatable around the tool body hole and a blade which engages with the blade carriage. The pipe cutting tool includes at least one retaining plate coupled to the blade carriage and rotatable about the tool body hole. The pipe cutting tool includes a pin which is configured to removably extend through the tool body hole and a hole formed through the blade carriage. The tool body includes a boss feature which engages with the retaining plate to hold the blade carriage when the pin is removed from the pipe cutting tool.

A garden shears has a first blade member, a second blade member, a controlling handle and a protecting member. The first blade member has a first cutting portion, a first aperture at a middle section, a first toothed section adjacent to the first aperture and below the first cutting portion. The second blade member has a second cutting portion, a second aperture at a middle section, a third aperture at a lower end. The controlling handle has a driving member with a fourth aperture and the second toothed section on a top edge at an upper section. The protecting member has a main body with two opposing ear portions, each ear portion having a fifth aperture and a sixth aperture.

Provided is a pair of hairdressing scissors with improved sharpness. The hairdressing scissors include a first scissor member, a second scissor member, and a connecting mechanism including a connecting member. The second scissor member is provided with a long hole relative to which the connecting member moves. Inner hollows of blade body parts are displaced toward the back side at proximal sides of the blade bodies, and curve in parallel with edge lines toward the tips of the blade bodies. Inner hollows of the intermediate parts are provided to pass through the center in the width direction of the intermediate parts. Of the inner hollows of the intermediate parts, contact points are provided at a portion between the inner hollow and the connecting member and at a portion more toward a shank part side relative to the connecting member.

Provided is a pair of hairdressing scissors with improved sharpness. The hairdressing scissors include a first scissor member, a second scissor member, and a connecting mechanism including a connecting member. The second scissor member is provided with a long hole relative to which the connecting member moves. Inner hollows of blade body parts are displaced toward the back side at proximal sides of the blade bodies, and curve in parallel with edge lines toward the tips of the blade bodies. Inner hollows of the intermediate parts are provided to pass through the center in the width direction of the intermediate parts. Of the inner hollows of the intermediate parts, contact points are provided at a portion between the inner hollow and the connecting member and at a portion more toward a shank part side relative to the connecting member.

A blade replacement apparatus of an electric instrument is provided. The blade replacement apparatus includes a nut, a nut loosening/tightening member, a locking member, and an operating member. One of the nut loosening/tightening member and the operating member has a first matching portion, the locking member having a second matching portion. The operating member is movable between an operating position and a non-operating position. When the operating member is in the non-operating position, the first matching portion engages with the second matching portion, and the rotation of the nut loosening/tightening member is obstructed by the locking member. When the operating member is in the operating position, the first matching portion is disengaged from the second matching portion, and the rotation of the nut loosening/tightening member tightens or loosens the nut.

A blade replacement apparatus of an electric instrument is provided. The blade replacement apparatus includes a nut, a nut loosening/tightening member, a locking member, and an operating member. One of the nut loosening/tightening member and the operating member has a first matching portion, the locking member having a second matching portion. The operating member is movable between an operating position and a non-operating position. When the operating member is in the non-operating position, the first matching portion engages with the second matching portion, and the rotation of the nut loosening/tightening member is obstructed by the locking member. When the operating member is in the operating position, the first matching portion is disengaged from the second matching portion, and the rotation of the nut loosening/tightening member tightens or loosens the nut.

A cutter includes a platform, two handles, a blade, a lever, two pawls, a helical spring and a torque spring. The platform is connected to the first handle. The lever includes a ratchet formed at a rear end and a block formed on a side. The blade includes a rear end formed with a slit for receiving the block. The first pawl is pivotally connected to the second handle. The torque spring includes an end in contact with the first pawl and another end in contact with the second handle for keeping a tip of the first pawl engaged with the ratchet of the lever. The second pawl and the handles are pivotally connected to one another. A helical spring includes an end connected to the second pawl and another end connected to the lever. The tips of the pawls are alternately engaged with the ratchet.