input: [0] Carbon Brush [1] 2 [2] 1 [3] Acts as the conductor between the stationary wires and the moving parts. Necessary to complete the electric circuit within the circular saw. [4] Plastic, steel, copper, graphite [5] Desired material properties (copper conductor) and cheap/functional (plastic and steel) [7] Cheap, fast and cost effective method of production for each part. [6] 
output: Plastic-Injection Molding, Copper-Stamped, Spring-drawn and spun