Profile: Maucotools offers portable line boring machine tools. Our portable line boring machine tools are designed and developed with the exclusive and patented dual systems. This important innovation makes our portable machine tools decomposable, which is built in two separate parts that can do independent machinings. The extension boring bar is manufactured in chrome steel with a wheelbase attachment of 72 mm, for cutting tools of 16 mm. It is suitable for joining additional extension boring bars through a rapid and eccentric joining system.