I can’t screw a rod into a StarFish base plate. What’s wrong? If you cannot screw a rod into a StarFish base plate, this indicates that you are using an incorrect rod: If you have a RR95666 650 mm Split Rod, ensure that you insert the bottom half of the rod into the base plate. The top half of the rod can only fit into the bottom half of the rod, not the base plate. We sell other support rods, such as for attaching to stirring hotplates for holding temperature sensors etc., so it could be that the rod you have is actually one of these rather than a StarFish rod. If you need any further assistance, please contact us with photos of the ends of the rod and its length measurement, and we would be happy to help you identify which rod you have.