3849b6c8__and_Decker_Drill____GICL_Wiki__Reason_for_Material_Selection
[Part Name] Motor End Bracket [Quantity] 1 [Model Number] 2B [Description] Round cylinder, terminals spring holders,black, rotates to reverse motor [Function] Holds motor together and reverse motor rotational direction [Material] Brass, plastic,and copper [Reason for Appearance] Fits with outer motor [Manufacturing Process] Injection Molding, Sheet Metal Forming [Reason for Material Selection] 
High conductivity, easy to produce plastic mold, prevents corrosion
Difference between revisions of "Group 12 - Black and Decker Drill" - GICL Wiki