Abstract: A tool for the installation of so-called press nuts comprises a draw bar which is axially displaceable in a housing. A draw mandrel having a threaded outer end portion for cooperation with a female thread in said press nut is connected to the outer end of said draw bar, so that the press nut can be secured in a bore of a workpiece by being upset by means of a pulling force from the draw mandrel upon axial displacement of the draw bar into said tool housing. Said draw mandrel is axially unmovably but rotatably connected relative to the draw bar. The rotor of a motor is journalled in the tool housing around the outer end of the draw bar and is drivable in one or the other direction of rotation and is arranged thereby to rotate the draw mandrel thereby to screw same into or out of the press nut before and after the upsetting of same.

Abstract: The invention concerns a tool for stamping of holes or the like in sheet material, such as metal plate. The tool is mountable on a handheld motor, such as a pneumatic or hydraulic piston and cylinder motor and comprises a stationary part supported against the motor cylinder and a movable part connectable to the motor piston. The displaceable tool part has at least one slot at right angles to the direction of the motor stroke and a through drilling extends through said slot at right angles thereto at a distance from its base. The portion of said drilling at the outside of the slot is formed as a stamping die, and the portion thereof inside of the slot accommodates a stamping plunger, whose inside end engages the stationary tool part. When a piece of sheet material is inserted into the slot with its edge in engagement with the base thereof and the motor is actuated, the plunger stamps a hole in said sheet material at a fixed distance from its edge.