Providing and fixing G.I. Sheet 0.80mm thick sliding shutters with 40mmx40mmx6mm angle iron frame with diagonal braces 3.15mm gusset plates at the junctions, hooks at top and 25mm dia pulleys at bottom and 40mmx40mmx25mm dia pulleys at bottom and 40mx40mmx6mm angle iron top and bottom guides including locking arrangement with handles etc. complete