The mod adds Reinforced chests made from any 4 logs and and 4 metal ingots:
Currently supported are iron and gold, modded metals will be added in future.
Reinforced chests behave exactly like normal one, except they are a little bit tougher (can only be exploded by a block of TNT directly touching it) and have additional 12 item slots.
After 1.1 amount of additional slots can be configured & different for each material.
NOTICE: Update 1.1.0 may make your chests disfunctional, break & re-place them to make them work again.