For drawing the circles onto the template and roof you need a water proof marker, paper, measuring tape and optionally vernier callipers.
For the actual metal works you need a pair of pliers, the tin scissors and a metal file.
You need silicone, a pop rivet gun and at least four pop rivets.
You need a drill (either battery driven or manual), a hammer and nail (to mark the points where to drill in the metal).
Optionally you can use a grinder to cut off metal from the original corugated iron sheets.