Board Thread:Questions and Answers/@comment-78.21.231.44-20121216103304/@comment-1863942-20121216140536

You are probably asking about replacing and removing IC2 Advanced Machines. These require the use of a Wrench, or an Electric Wrench. It is highly recommended to use the Electric Wrench as it has a Lossless Mode that will remove the machine without ever having the chance of returning just a machine block.