The McMaster-Carr 5344K44 SBR Rubber Gasket Twist-Claw Hose Coupling Pack of 3 is a set of fittings designed for use in hydraulics, pneumatics, pumps, and plumbing systems. The twist-claw mechanism allows for easy and secure attachment of the coupling to a hose or fitting. Made by the reputable brand McMaster-Carr, these units are durable and reliable for various industrial applications. With a pack of 3 units included, this product offers great value and convenience for businesses and professionals in need of high-quality fittings and adapters.