In this project we focus on quality checking of product. From older day the cam shaft checking is done by very simple method, they use one small metal rod. Which is smaller in diameter compared to oil hole diameter of camshaft is inserted in oil hole and another is inserting in hole which are provided on general hole, which is perpendicular to the axis of shaft. When both rod are touch to each other then quality checking person know the hole is incorrect. This project established new way idea of product checking in advance.