3849b6c8__and_Decker_Drill____GICL_Wiki__Reason_for_Material_Selection
[Part Name] Chuck [Quantity] 1 [Model Number] XD200503231-1-7 [Description] Gear on one side, bracket, bit holder, felt bushing, shaft [Function] Bushing to prevent debris from entering case, and hold bit [Material] Plastic, steel, felt [Reason for Appearance] Matches color scheme, to hold bit, ergonomically designed [Manufacturing Process] Machining, Injection Molding [Reason for Material Selection] 
Doesn't wear on case, cheap, user comfort, high strength, durable
Difference between revisions of "Group 12 - Black and Decker Drill" - GICL Wiki