Keep your precision measurement tools in perfect working order with this genuine SPI Combination Square Clamp Screw Assembly. Specifically designed for use with SPI Combination Squares, this replacement part ensures your measuring instruments maintain their accuracy and functionality. The clamp screw assembly securely locks the square's blade in position at your desired measurement, allowing for consistent and reliable results in your projects. Made with SPI's commitment to quality, this part #13-242-3 is manufactured to exact specifications to match your original equipment. Whether you're a professional machinist, woodworker, or DIY enthusiast who relies on precise measurements, this replacement component will help extend the life of your valuable combination square. Don't compromise your work with worn or damaged parts - restore your tool's performance with this authentic SPI replacement component.