New tool/weapon, the copper hammer, a new, high-tier tool/heavy weapon.

 
As a tool: it will act as a way to recycle old tools and ingots
it would allow you grind up ingots, and tools into dust, allowing you to craft them back into ingots, a much better way to recycle tools then smelting them. depending on the durability on the tool, it would give you more or less dust, lets say a half used iron pickaxe would give you 9 iron dust, allowing you to craft one iron ingot. a full durability would give 18, allowing you get resources back from tools no longer needed, without the huge loss of smelting them.
For bedrock exclusive feature: if you grind copper ingots, you get copper dust, which allows you to mix it with redstone dust allowing you to get copper infused redstone, allowing quasi connectivity like behavior, for example when making a piston, instead of redstone dust you uses copper infused redstone dust, allowing you to make a special piston that has quasi connectivity, same thing for other redstone items like droppers, dispensers, observers etc. this allows for more parity between bedrock and java without breaking existing redstone builds.
As a weapon: it can act as a heavy early game weapon kinda like the mace, dealing devastating damage but requires it to charge up for 7 seconds, it can do 15 damage when charged up but will take a single point of hunger. if you miss your charged attack, you will take a heart of damage. you can add density, and quickcharge to lower the time and increase damage at the cost of more hunger and damage when missed.