A hand-held knockout punch driver includes a housing, a motor, a drive assembly with an output member movable relative to the housing, and a head unit removably coupled to the housing. The head unit includes a body, an input member movable relative to the body, and a draw rod to which a punch or a die is attachable. The draw rod is configured to move axially relative to the body in response to movement of the input member relative to the body. The knockout punch driver also includes a quick-release mechanism to removably couple the body to the housing. The output member is configured to engage the input member such that the input member moves relative to the body in response to movement of the output member relative to the housing, and the body engages the quick release mechanism separately from engagement between the output member and the input member.

A hand-held knockout punch driver includes a housing, a motor, a drive assembly with an output member movable relative to the housing, and a head unit removably coupled to the housing. The head unit includes a body, an input member movable relative to the body, and a draw rod to which a punch or a die is attachable. The draw rod is configured to move axially relative to the body in response to movement of the input member relative to the body. The knockout punch driver also includes a quick-release mechanism to removably couple the body to the housing. The output member is configured to engage the input member such that the input member moves relative to the body in response to movement of the output member relative to the housing, and the body engages the quick release mechanism separately from engagement between the output member and the input member.

A hand-held knockout punch driver includes a housing, a motor positioned within the housing, and a head unit removably coupled to the housing. The head unit includes a draw rod to which at least one of a punch or a die is attachable.

A hand-held knockout punch driver includes a housing, a motor positioned within the housing, and a head unit removably coupled to the housing. The head unit includes a draw rod to which at least one of a punch or a die is attachable.

A labor-saving hole punch includes a base, an operating unit, a linking unit, and a punching unit. The operating unit is pivotally mounted to the base for rotation relative to the base. The linking unit has two ends, one of which is connected to the operating unit and the other is pivotally mounted to the base. The punching unit is mounted to the base and connected to the linking unit. The operating unit and the linking unit are pivotally mounted to the same side of the base. The punching unit is connected to a midsection of the linking unit. The linking unit is actuated by the operating unit to drive the punching unit to punch. With the cooperation among the operating unit, the linking unit, and the punching unit, the hole punch has a long punch stroke to punch a larger number of paper sheets and to be labor-saving.

A labor-saving hole punch includes a base, an operating unit, a linking unit, and a punching unit. The operating unit is pivotally mounted to the base for rotation relative to the base. The linking unit has two ends, one of which is connected to the operating unit and the other is pivotally mounted to the base. The punching unit is mounted to the base and connected to the linking unit. The operating unit and the linking unit are pivotally mounted to the same side of the base. The punching unit is connected to a midsection of the linking unit. The linking unit is actuated by the operating unit to drive the punching unit to punch. With the cooperation among the operating unit, the linking unit, and the punching unit, the hole punch has a long punch stroke to punch a larger number of paper sheets and to be labor-saving.

A turret punch includes a first body, a second body, a third body, a pin, a first resilient member, a turret, function members, a second resilient member and a connector. The second rail portion of the third body is linearly movable along the first rail portion of the first body. When operating the first and second bodies, the function member that is located corresponding to the first function end moves linearly so as to be engaged with or to be disengaged from the first function end of the first body, such that the holes are punched along a straight line.

A turret punch includes a first body, a second body, a third body, a pin, a first resilient member, a turret, function members, a second resilient member and a connector. The second rail portion of the third body is linearly movable along the first rail portion of the first body. When operating the first and second bodies, the function member that is located corresponding to the first function end moves linearly so as to be engaged with or to be disengaged from the first function end of the first body, such that the holes are punched along a straight line.

A hole punch assembly includes two locating features for forming holes in a trim piece overlying a metal sheet with ridges formed therein. One locating feature is a groove into which one of the ridges is insertable. The other locating feature is a portion of the outer surface configured such that, when one of the ridges in in the groove and the trim piece contacts the portion of the outer surface, a punch is positioned to form a hole in the trim piece.

A hole punch assembly includes two locating features for forming holes in a trim piece overlying a metal sheet with ridges formed therein. One locating feature is a groove into which one of the ridges is insertable. The other locating feature is a portion of the outer surface configured such that, when one of the ridges in in the groove and the trim piece contacts the portion of the outer surface, a punch is positioned to form a hole in the trim piece.