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 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 doors need to be removed for decorating or moving furniture. Spiral knuckle lifts door as it opens Ideal For Uneven Floors & Carpets Self closing Door can be easily lifted off Fixings included" Size L x W mm: 75 x 72 Knuckle Dia. mm: 14.0 Hole Dia. mm: 4.60 Thickness mm: 2.5 Knuckle Type: Plain Corner Type : N/A Material: Steel Finish: Zinc