Review taken from TREX Tuning:

The programmable paddles can be fitted with or without the supplied weights.

 

Without the weights the paddles are very similar in size as well as weight to the standard paddles supplied with the T-Rex SE V2. Where they differ is in their shape. What makes these paddles unique is that they can be weighted to change the way that they respond in the air.

They come supplied with two metal bars which insert down and into the leading edge of the paddle. Once in place they cannot come out in flight as they are held in by centrifugal force. There is a small hole on the outside edge of the paddle which can be used to push the weight back out of the paddle should you want to remove it.