a9cc56f1____Group_15___2012___GICL_Wiki__3
[0] Roller Pin [1] 1 [2] 1 [4] Steel [5] Durable and has desired material properties [6] Casting [7] Cheap and quick, allowing for easy mass production [3] 
Provides the main connection between the foot and the upper blade guard. Works using friction caused by the components tendency to expand.
Gate 3 - Group 15 - 2012 - GICL Wiki