A connected portion 68, 68m is disposed at an end of one of a rotary member 41 (first rotary shaft) of a tool unit 10 and a rotary shaft 62a (second rotary shaft) of a driving unit 60, and a connecting portion 52, 52m which is connected to the connected portion 68, 68m is disposed at an end of the other thereof. The connected portion 68, 68m has a guide shaft 68a which rotates integrally with the rotary member 41 or the rotary shaft 62a, and a plurality of engaged portions 68b, 68p disposed around the guide shaft 68a. The connecting portion 52, 52m has a guide hole 52a into which the guide shaft 68a is inserted, and the engaging portions 52b, 52q with which the engaged portions 68b, 68p are engaged and which are disposed around the guide hole 52a.

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.

A hand-held tool that is prepared for remote control has a handle region, an actuating button, and a removable attachment part held in the handle region. The attachment part has a handling extension and a collar encompassing the handle region. The collar includes first and second collar parts pivotably connected together. The attachment part acts upon the actuating button. The actuating button is displaced into an actuating position by a housing section of the collar for a duration of an arrangement of the attachment part on the handle region.

A multi-purpose hand tool includes a first side and a second side that are pivotally connected. The first side includes a lower end having a first handgrip and an upper end including a shaft having a hammer head at one end; a first recess extending at least partially along a bottom of the shaft for holding one or more straight fasteners; and a second recess located substantially in a bottom part of the hammer head for holding one or more rounded fasteners.

Various embodiments of pliers and pipe wrenches are provided. Wire cutters enable a finger pivot hole to enhance the grasp of the wire cutters while rotating the tool and/or stripping wire. Pipe wrenches include different configurations of teeth to improve durability and grip on a workpiece. Pliers are provided with axial teeth to enhance gripping a workpiece in different directions. Pliers are provided with selectable mechanical advantages so that a user may select the mechanical advantage desirable for a particular application.

The present invention discloses a ring cutter and ring cracker intended for use by medical personnel. The ring cutter employs a tissue guard that slips under the ring to protect the patient's finger or other appendage. A clipper head is inserted into the tissue guard. The tissue guard does not move and prevents the jaws of the clipper from injuring the patient. The tissue guard may be constructed of plastic that will break away after use to prevent contamination between patients. The invention also incorporates a ring cracker for breaking tungsten or ceramic rings. A recess in a ring base in one of the arms of the ring clipper retains a part of a ring. In the other arm, a threaded bolt with a hardened tip extends toward the ring. The arms of the clipper can be locked by a bar in a fixed position. A knob on the bolt allows a hardened tip at the end of the bolt to exert pressure on the tungsten or ceramic ring until it cracks, without injury to the patient.

The present invention discloses a ring cutter and ring cracker intended for use by medical personnel. The ring cutter employs a tissue guard that slips under the ring to protect the patient's finger or other appendage. A clipper head is inserted into the tissue guard. The tissue guard does not move and prevents the jaws of the clipper from injuring the patient. The tissue guard may be constructed of plastic that will break away after use to prevent contamination between patients. The invention also incorporates a ring cracker for breaking tungsten or ceramic rings. A recess in a ring base in one of the arms of the ring clipper retains a part of a ring. In the other arm, a threaded bolt with a hardened tip extends toward the ring. The arms of the clipper can be locked by a bar in a fixed position. A knob on the bolt allows a hardened tip at the end of the bolt to exert pressure on the tungsten or ceramic ring until it cracks, without injury to the patient.

A multi-purpose hand tool includes a first side and a second side that are pivotally connected. The first side includes a lower end having a first handgrip and an upper end including a shaft having a hammer head at one end; a first recess extending at least partially along a bottom of the shaft for holding one or more straight fasteners; and a second recess located substantially in a bottom part of the hammer head for holding one or more rounded fasteners.

The present invention discloses a method of manufacturing a tool with a cutting edge comprising a substrate for supporting and a cladding layer for forming the cutting edge, and a transition zone connecting the substrate and the cladding layer; the method of manufacturing it includes: providing a first material used for forming the substrate and having a first side; providing a second material which is clad onto the first side by way of laser cladding to form the cladding layer, and forming a transition zone between the cladding layer and the substrate where the first material and the second material are metallurgically bonded. The tool obtained by adopting the manufacturing process according to the present invention combines the following advantages: good toughness of the cutter body, high hardness of the cutting edge, not easy breaking off of the cutter body and the cutting edge, and long service life.

Shears having two limbs connected at a revolute joint, each limb comprising a handle region at one end and a cutting edge at the other end. One limb is fixed relative to the revolute joint during an opening and closing movement, and one limb is movable. The limbs move between an open position and a closed position while being limited by a stop and, in the closed position, the cutting edges pass each other over substantially their entire length. On the handle side of the revolute joint, one limb extends relative to the other limb such that it is supported in a planar manner on both sides in a region of overlap with the other limb, wherein the limbs comprise surface regions which, in the closed position, rest against one another in the region in which they are on top of each other and are each exposed on the opposite side.