This is a tool designed to form a nozzle and core burning R Candy or Rocket Candy rocket engine. You insert the tool into the conduit, put the clay in, and use the ram to form the nozzle. Following this, put your R Candy in and use the ram to force the propellant into a core-burning shape. When sufficient propellant has been rammed, another layer of clay is placed in and also rammed.
R Candy Nozzle Forming & Ramming Tool for 20mm PVC Conduit by industriald is licensed under the Creative Commons - Public Domain Dedication license.