a9cc56f1____Group_15___2012___GICL_Wiki__3
[0] Inner and Outer Washers [1] 1 [2] 1 [4] Steel [5] Durability and strength [6] Stamped [7] Cheap and cost effective [3] 
Distributes the load created by the saw during use.
Gate 3 - Group 15 - 2012 - GICL Wiki