The Threaded Coupler/Ball Link Set is Used with Pushrods or Wires. INCLUDES: One Solder-On/Threaded Coupler (brass) One Hex Nut One Flat Washer (zinc plated) One Threaded Ball-End (metal) One Ball-End Socket (White nylon) FEATURES: The ball socket has a hex shaped shank for easy gripping and nylon construction lock the coupler threads in place. It needs to be used with a 2-56 rod. COMMENTS: The customer will need soldering flux, solder, and a soldering gun. 4-21-94sk ir/jl