a9cc56f1____Group_15___2012___GICL_Wiki__3
[0] Lower Blade Guard [1] 1 [2] 2 [4] Steel [5] Durability, Strength, cost, and safety concerns. [6] Die Casting [7] Cheap and cost effective for steel components of low complexity. [3] 
Provides a rigid/pivoting structure that “hides” and protects the lower portion of the blade when not in use. It is primarily for safety concerns and adds little stability to the overall product.
Gate 3 - Group 15 - 2012 - GICL Wiki