We have been working on this project for the past three months. The linkage is made of stained steel. We offer you a new geometry for the suspension of Begode Master or Begode Master Pro. This upgrade will prevent bottoming of your shock and extend its life because you won't have to pump 300+ PSI anymore. With this geometry, you'll also have more suspension travel. This is a must-upgrade for your Master/Master Pro.Click here to see the installation video.Shock is not included in the kit.Kit includes 2 large and 2 small brackets. You have to use all screws and other stuff from your wheel.