Copper tools and armor (and using copper to get enchantments)

The copper toolset would have decent speed (like iron) but low durability (like gold). The main perk of copper tools is that they mine blocks just as fast when you're underwater as when you're above water.

Copper armor provides less protection than iron and less durability. Why would you use it then? Well any copper tool or item, if struck by lightning, will receive a random enchantment. Using lightning rods you can direct lightning to strike your copper items and enchant them. This also works with other armor types IF they have a copper trim, so this introduces another method of getting enchantments that also gives lightning rods a new purpose.