The plastic components are CNC machined from solid Delrin, including the spool in the small model. In some models the spools are in Pom c plus 30% carbon fiber with color of your choice. The clutch is jerky with anti-lock systems, bearing operation, adjustable in intensity. 2 mm thick stainless steel frame, the mounts are universal and fit all rifles on the market. Particular attention was paid to robustness and design.