The easiest way to hang pictures is these Picture Screws! No need for drilling! Simply screw one of these screws into the wall with a standard screwdriver. The large ribbed "washer" holds the screw firmly in place while the thin shaft of the screw displaces very little plaster. Each 2.5cm (1") brass plated zinc screw holds up to 10kg when installed. Comes in a pack of 10.