Perfect to assist installing fans on an uneven surface, typically when there is a ceiling rose. Installing a ceiling fan onto a ceiling rose can often damage the design and sculpting.
T-Hook fittings allows for only one hole to be cut through the ceiling rose reducing the impact to the ceiling in case the fan is every removed at a later stage.
The ceiling fan must be secured to a fixed mounting in the ceiling.
Please consult with your electrician to see if a T-Hook is necessary for your installation.