Need to make quick connections in a hydraulic system? This set includes a pair of M14 x 1.5mm female thread quick connect couplers. They're made from carbon steel for durability with high-pressure fluids. The quick-connect design lets you attach and detach lines fast without tools, which is super handy for equipment that you need to switch out often. They come brand new, ready to screw into your existing lines. Common for log splitters, tractor implements, and other hydraulic machinery. A simple way to add convenience to your setup. Just make sure the thread size matches your hoses!