These Extension irons are particularly useful for joining small extension flats to the main flat. By extending or reducing the height of masking flats, scenery can be made to fit a wide variety of touring venues allowing tall flats to be reduced in height to fit under fly floors or even into short vans. The socket is gently dovetailed to ensure an easy location yet a snug fit. Sizes: iron length x width 300 x 25mm, Socket length x width 153 x 66mm. Fixings needed: iron - 3 off No.10 (5mm) csk wood screws, Long Socket - 6 off No.8 (4mm) csk wood screws.