Abstract: A lock comprising a hollow cylindrical seat, a cylindrical lock body for insertion into the seat and having a cavity in its exterior surface to accommodate a sphere therein, a screw hood for screwing onto the lock body, the hood having a plurality of cavities on its interior surface to accommodate the sphere, and a cylindrical lock barrel for insertion into the lock body and having a conical recession for accommodating the sphere to permit removal of the lock barrel and for pushing the sphere into the cavity in the screw hood to prevent removal of the lock barrel from the lock body.

Abstract: A multi-purpose stapler is provided comprising a stapling means, a staple removing means and a hole punching means with shiftable actuator mounted on a common base. An actuator is provided which is movable between first and second positions. In the first position of the actuator, downward movement of a press handle of the stapler is limited so that stapling cannot occur but punching and staple removing can occur. In the second position of the actuator stapling can occur. The actuator functions to depress a punch rod when in its first position.

Abstract: A multi-purpose stapler is provided comprising a hole punching means, a stapler removing means and a stapling means mounted on a common base.

Abstract: Canteen with water color painting accessories comprising through one side wall of a canteen, a cylindrical central recess to take a cup for brush washing, on the surface of the said wall, a tray with radial disposed compartments being provided to hold tubes of water color, a cover of the tray with a central opening of the same diameter as the said central recess of the canteen and also with multi-sections serving as color mixing pallet, the washing cup being inversely screwed into the central recess to retain the cover on the tray.