If you work with equipment that uses coupler pins, these Tivnhuils safety pins are exactly what you need for secure connections. The 1/4 inch diameter by 2.36 inch length is a common size that works with various industrial and equipment applications. The square design provides better grip and easier installation than round pins, and the locking mechanism ensures they stay securely in place during operation. You get two pins in the package, which is perfect for having a spare or for applications that require multiple connection points. The quality construction means they withstand repeated use without bending or failing, which is crucial for safety in equipment applications. Whether you're working with agricultural machinery, construction equipment, trailers, or any application that requires secure pin connections, having reliable safety pins like these prevents accidents and downtime. The simple design makes them easy to install and remove when needed, but secure enough to stay put during vibration and movement. Seriously, if you've been dealing with cheap pins that bend easily or don't lock properly, upgrading to these quality safety coupler pins will give you peace of mind knowing your connections are secure. They're one of those simple but essential components that can prevent bigger problems down the line in equipment maintenance and operation.