A handheld punching device includes an operating grip pivotably connected to a holding grip to have a loading end turned in an up-down direction, a transmitting lever pivotably connected to the loading end to transmit a torque to turn a driving end, a punching seat pivotably connected to the holding grip and defining a cutting space for receiving a workpiece to be punched, and a plurality of punch units disposed between the driving end and the punching seat and each having a punch head movably and fittingly disposed in the punching seat along a straight path in the up-down direction, and a press head in abutting engagement with the driving end to be moved by the torque and to drive movement of the punch head through the cutting space for creating a hole in the workpiece.

A bevel stud punch attachment comprising a cylindrical head with an inner lip coupled to a punch to puncture a hole through a preselected material when a force is applied to drive the punch to penetrate the cylindrical head with the inner lip and the hole having a concave rim around an outer edge of the hole created by the inner lip. A method of using the bevel stud punch attachment to puncture a hole with a concave rim, comprising positioning the preselected material between the cylindrical head with the inner lip and the punch and applying a force to drive the punch through the preselected material and into the cylindrical head with the inner lip.

A bevel stud punch attachment comprising a cylindrical head with an inner lip coupled to a punch to puncture a hole through a preselected material when a force is applied to drive the punch to penetrate the cylindrical head with the inner lip and the hole having a concave rim around an outer edge of the hole created by the inner lip. A method of using the bevel stud punch attachment to puncture a hole with a concave rim, comprising positioning the preselected material between the cylindrical head with the inner lip and the punch and applying a force to drive the punch through the preselected material and into the cylindrical head with the inner lip.

A device for punching one or more holes in a material is disclosed. The device can include a body, a fixed handle attached to the body, and a moveable handle attached to the body. The device can further include a cutting die and an adjustable depth gauge attached to the body. The adjustable depth gauge can be moveable relative to the body of the device.

A device for punching one or more holes in a material is disclosed. The device can include a body, a fixed handle attached to the body, and a moveable handle attached to the body. The device can further include a cutting die and an adjustable depth gauge attached to the body. The adjustable depth gauge can be moveable relative to the body of the device.

A punch for punching a sheet of material, the punch having a body formed with a fissure for receiving the sheet of material, a pivot shaft defining a pivot point, and a lever pivotably mounted about said pivot shaft has an open position and a closed position. A block is provided which is positionable between the lever and the body. The body is provided with longitudinal support ridges and the lever is provided with side ridges, with the pivot point positioned in substantially the same plane as the longitudinal support ridge so that when the punch is closed, the side ridges of the lever pass outside of the support ridges of the body in a nesting relationship, allowing the punch to form a flat profile when closed.

A punch for punching a sheet of material, the punch having a body formed with a fissure for receiving the sheet of material, a pivot shaft defining a pivot point, and a lever pivotably mounted about said pivot shaft has an open position and a closed position. A block is provided which is positionable between the lever and the body. The body is provided with longitudinal support ridges and the lever is provided with side ridges, with the pivot point positioned in substantially the same plane as the longitudinal support ridge so that when the punch is closed, the side ridges of the lever pass outside of the support ridges of the body in a nesting relationship, allowing the punch to form a flat profile when closed.

To provide a pipe drilling tool for forming, in a pipe, a hole for injecting a non-oxidizing gas such as nitrogen, when joining pipes such as refrigerant pipes by brazing, wherein the pipe drilling tool has a compact configuration allowing work thereof to be performed by the drilling tool being gripped by the hand of a user, does not readily generate burrs, and prevents cutting residue and burr residue from remaining in the pipe.

To provide a pipe drilling tool for forming, in a pipe, a hole for injecting a non-oxidizing gas such as nitrogen, when joining pipes such as refrigerant pipes by brazing, wherein the pipe drilling tool has a compact configuration allowing work thereof to be performed by the drilling tool being gripped by the hand of a user, does not readily generate burrs, and prevents cutting residue and burr residue from remaining in the pipe.

A method of making a side-to-side anastomosis includes making first and second holes through a first vessel, and second vessel, respectively, by receiving a jaw of a punch tool into exposed ends of the respective vessels, and then moving a punch tool toward the jaw and through the wall of the vessel. The vessels are joined with an elongate eyelet with a passage that matches a shape of the oval first and second holes. The long axes of the oval holes are oriented parallel to a longitudinal axes of the respective vessels.