This is a set of ankle joints and feet for Classics Optimus/Magnus. They make the toy slightly taller, but more importantly they add the ankle tilt that collectors go crazy for these days. While they should be simple to install and assemble, a short length of 2mm metal rod in each assembly through the holes provided will make the joint stiffer and slightly more secure. Designed for and tested in WSF Polished.
Note: The extra height means that the popular "City Commander" armour no longer fits. If you want a set which allows that, try these: https://www.shapeways.com/model/1667094/classics-truck-leader-feet-and-ankles-short.html