Yes they do Karen, however the base of the ball also has the screw threads that the upper support bracket (silver metal in the pictures) attach to. With out this the handles are not as stable - it's not that bad though about 5mm flex if you push, I would be happy to use. So may want to ask Nauticam if there is an alternative top piece for the handles. The screw thread is large M8 I think but don't quote me on that.
- KarenW likes this