KNUCKLE JOINT

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HINGE JOINT In other words, a knuckle joint refers to the same type of connection as a hinge joint in a mechanical system or within an object's construction. This type of joint allows for movement in one direction while maintaining stability and rigidity in other directions. Examples of knuckle joints can be found in door hinges, car hoods, and even some types of furniture. So when you hear "knuckle joint," just think "hinge joint" instead!