a9cc56f1____Group_15___2012___GICL_Wiki__3
[0] Upper Blade Guard [1] 1 [2] 1 [4] Steel [5] Durability, strength, cost, and safety reasons. [6] Die casting [7] Low cost and efficient for this part/material type (medium complexity) [3] 
Acts as a rigid body providing support and stability to the saw. The saw blade is housed here and thus this blade guard provides much needed safety measures by “hiding” the top of the saw.
Gate 3 - Group 15 - 2012 - GICL Wiki