Steel rising hinges feature a spiral knuckle that lifts the door throughout the opening cycle making it ideal for applications where there is an uneven floor surface or obstructions such as deep pile carpets. The spiral feature will also enable to the door to self close making this a popular hinge choice for toilet or cubicle doors. As the knuckle is not fixed, it enables the door to be lifted off the hinge making it ideal for situations when doLifts doors as they open – ideal for uneven floors.Self closing – ideal for cubicles.Door can be lifted off at a later date.