Just a Hammers!

This mod adds hammers. They mine an area of 3x3x1 blocks. You can also upgrade them. You can increase the  mining speed by adding redstone dust(or block). Obsidian allows you to increase the durability. And to increase the mining level, use a diamond. You can apply upgrades by right-clicking on the hammer in the inventory or combine the hammer with the item to upgrade on the anvil.