This is the AST Cam Alignment Tool T-40030 by Assenmacher. This tool is designed for use in the automotive industry and is a must-have for any mechanic or DIY enthusiast. It is a high-quality tool that is made to last and is perfect for aligning camshafts with precision. The tool is easy to use and comes with clear instructions for use. It is a great addition to any toolkit and is sure to save you time and money in the long run.