Board Thread:Questions and Answers/@comment-95.178.132.13-20130611172247/@comment-10703376-20130613014834

I've done a little research. The MFR Block Breaker breaks the block in front of it when provided a charge of EU (IC2) or MJ (BC) power. It only breaks the one block in front of it. It can't break unbreakable blocks, like bedrock. It spews the items broken out the back side, and can put the item into a pipe.

For convenience's sake, I would recommend the Redpower Block Breaker, only because it doesn't require energy.