The present disclosure provides a reversible cutting tool to cut a material such as sheet metal on a press brake. The reversible cutting tool is further comprised of a handle portion to grip and move the cutting tool, wheels to allow the cutting tool to slide along the press brake, a blade portion to cut the material, and an adjustable cutting mechanism. The adjustable cutting mechanism allows the reversible cutting tool to pivot and cut the material in two different directions, and also allows the cutting tool to be set in a third storage position. In a preferred embodiment, the adjustable cutting mechanism is comprised of a channel on an underside of the cutting portion, the channel configured to receive a plunger, the plunger to slide between two opposed cutting positions and a storage position.

An example tin snip tool includes a first blade assembly including a first blade and the second blade assembly including a second blade. The example tin snip tool may also include a bolt configured to provide a pivot point that couples the first blade assembly to the second blade assembly and permits at least a portion of the first blade to bypass a portion of the second blade during a cutting operation, and a blade bypass calibrator including a movable adjustor member coupled to the first blade assembly and configured to contact the second blade assembly when the tin snip tool is in a closed position. An extension length of the adjustor member may define a blade bypass angle defined between a first blade tip and a second blade tip when the tin snip tool is in the closed position.

A hand-held drive cleat tool for the forming of sheet material such as drive cleats. The tool has a first handle; a second handle pivotably coupled to the first handle at a handle pivot; the handle pivot having a handle pivot axis; an inner jaw coupled to the first handle; the inner jaw having an inner jaw cutting edge substantially triangular in cross section in an inner jaw plane parallel to the handle pivot axis; an outer jaw coupled to the second handle, the outer jaw having an insert surface beveled in a cutting plane orthogonal to the inner jaw plane; the outer jaw having a surface defining an outer jaw cutting edge adjacent which the inner jaw cutting edge passes; and wherein rotation of the second handle relative to the first handle rotates the inner jaw relative to the outer jaw.

A hand tool includes a first jaw; a first handle coupled to a second jaw, the second jaw pivotably coupled to the first jaw and having a first geared structure, the first geared structure including a first plurality of teeth and a first bearing surface; and, a second handle coupled to a lever, the lever pivotably coupled to the first jaw and including a second geared structure, the second geared structure including a second plurality of teeth and a second bearing surface, wherein the first and second handles are movable between a full open position and a full close position such that during movement from the full open position to the full close position, the first plurality of teeth are at least partially engaged with the second plurality of teeth and the first and second bearing surfaces are in rolling contact.

Hand tools which have an ergonomic using a palm handle and finger handle designs which achieve mechanical efficiency and ease of use. The ergonomic handle is compatible with the muscle movements of an operator using a hand tool reducing muscle strain and pain. Optionally, the palm and finger handles can have ergonomically designed cushions. In an embodiment, the finger handle can have a finger set which has a forward finger flange, a tail finger flange and a pinky grip. The ergonomic handle can also use a relief washer system to achieve a smooth low frictional resistance cutting stroke.

Hand tools which have an ergonomic using a palm handle and finger handle designs which achieve mechanical efficiency and ease of use. The ergonomic handle is compatible with the muscle movements of an operator using a hand tool reducing muscle strain and pain. Optionally, the palm and finger handles can have ergonomically designed cushions. In an embodiment, the finger handle can have a finger set which has a forward finger flange, a tail finger flange and a pinky grip. The ergonomic handle can also use a relief washer system to achieve a smooth low frictional resistance cutting stroke.

Pliers have two pliers handles guided such that they cross one another in a joint region having a stationary joint bolt. Gripping regions are formed on the pliers handles on one side of the joint region, and working regions are formed on free ends of the pliers handles on the other side, said working regions extending to form a pliers jaw. The working regions have first and second toothed regions that come into contact when the pliers jaw is closed. In the first toothed region, in a sequence in the longitudinal extension of the pliers handle, the tooth tips end in a surrounding surface that is flat in the longitudinal section and in contact with same, and the tooth tips of the opposing second toothed region end in a surrounding surface that is convex in the longitudinal section and in contact with same.

A hand tool includes a first jaw; a second jaw rotatably coupled to the first jaw, the second jaw including a first set of projections and a first bearing surface, the first bearing surface having a first curvature; and a lever coupled to the first jaw, the lever including a second set of projections and a second bearing surface, the second bearing surface having a second curvature. During a movement of the first and second jaws from a full open position to a full close position, the first and second sets of projections are at least partially engaged to prevent a slippage between the first and second bearing surfaces that are in a rolling contact during the movement of the first and second jaws from the full open position to the full close position.

Pliers have two pliers handles guided such that they cross one another in a joint region having a stationary joint bolt. Gripping regions are formed on the pliers handles on one side of the joint region, and working regions are formed on free ends of the pliers handles on the other side, said working regions extending to form a pliers jaw. The working regions have first and second toothed regions that come into contact when the pliers jaw is closed. In the first toothed region, in a sequence in the longitudinal extension of the pliers handle, the tooth tips end in a surrounding surface that is flat in the longitudinal section and in contact with same, and the tooth tips of the opposing second toothed region end in a surrounding surface that is convex in the longitudinal section and in contact with same.

A sheet cutting and bending apparatus for cutting a wavy sheet and forming trapezoidal notches required for installation includes a base, two cutters at an end of the base, and a force applying mechanism for driving the two cutters. A knife of the cutters has no handle but just has a curved force receiving edge at the rear edge. The force applying mechanism has two rocker aims driven by a rocker rod and a force applying rod bridging between the two rocker arms for abutting a force receiving edge of the knife to produce a shear force and pushing the knife efficiently to cut two incisions at an edge of the sheet. In addition, a bending mechanism is linked with the force applying mechanism and provided for flipping a plate between the two incisions inwardly to form trapezoidal notches required for installation at the edge of the sheet.