Installation: Make sure the power is disconnected during installation, when installing the bracket, have two screws in half way, make sure the angle and position of the blades are as you want them before tightening. If needed, you can adjust the fan arm by drilling more holes in the fan blades to better fit different models of ceiling fans. Drilling holes on wooden fan blades is not recommended. Advantages: Improve comfort, air while avoiding noise from unstable fan arm, and also improve the security of the ceiling fan. Solve the fan arm problem and extend the service life of the old fan with less cost than replacing it with a new one. Caution: Our ceiling fan blade arm are suitable for most 52inch fan blades. Before purchasing, please make sure to measure and confirm the size of the fan blade arm holes to they match your ceiling fan blades. Application: When the fan starts to get unbalanced and make noises, try replacing the fan blade arm. This fan blade arm is designed with stylish colours and materials to fit most ceiling fans, even those that have been in use for decades without any identifying name.