Mechanical Saw
Mechanical saws are powered through rotational force, and when placed down facing to the side they will automatically chop down wood blocks in front of them. When chopping down a tree, it will automatically destroy the entire tree by only destroying the bottom-most block.
When mechanical saws are placed facing upwards, logs can be dropped on top of them to make them into stripped logs. Furthermore, when dropping stripped logs on top of the saw, it will make them into 5 planks per log, instead of the usual 4 when crafting. This way, it is more efficient than normal crafting.