Doc King Rear Binding Post Assembly - Copper - This Rear Post Is Drilled To Except The Clip Cord When Mounted In Both A Vertical Or Horizontal Postion. Assembly Includes (1) Electrical Grade Solid Copper Post .375" (3/8") Dia X .480" Long, (2) #8 Copper Flat Washers, (2) Black Nylon Shoulder Washers, And (1) 8-32 X 1/2" Button Head Cap Screw. Design Courtesy Of Jerry Riegger And Ahren Bloomquist.