Have you ever animated a mask with 100 keyframes then had to modify each and every one of them by hand to correct errors? With KeyTweak, you only need to modify one or two keyframes and the others are automatically changed for you. What’s more, with KeyTweak you can modify not only masks, but any other keyframed property too. For example, you can for example also use it to correct a drifting track, or quickly refine the keyframed movement of a layer.

Home page - https://aescripts.com/keytweak/