Improvements made to the new professional model:

1.) A new axle was added allowing the footplate to rotate making operation smoother and more natural. Not only is the new design more durable. The reduced resistance allows the user to jump higher and farther.

2.) New nylon strap replaces plastic strap.

3.) More durable rubber stopper that's easier and cheaper to replace.

4.) New light weight aluminum alloy footplate replaces the plastic footplate. This new plate is much stronger and lighter by 400 grams.