Used this with a rubber coated magnet as the base for my phone mount in my '81 Toyota FJ40 Landcruiser.
I am very happy to the additional piece to work with iPad and tripod.
I ordered my brackets at 9 pm and had them in 2 days! They are going in my planting tractors so I haven't had a chance to test them but I have put them together and they are well made.
Threaded Ball Mount | 1/4"-20 Receiving Hole | 20mm Ball