Streamline your engine assembly process with this high-quality piston ring squaring tool. Designed for professional mechanics and DIY enthusiasts alike Simple design makes it accessible for beginners and professionals. This tool eliminates guesswork, giving you the confidence of a perfect fit every time, Fits stock bore and verified to work on a .25, .5, .75 and 1mm + bore! Don’t miss out on this 3D printed essential tool for any engine rebuild project.