This specialty rod is threaded for most of its length and includes a carriage piece that will move along its length as it turns. Standard K'nex rods can be installed into the carriage pieces to allow it to be built into your model.
The rod measures approximately 7.5 inches in length, the same as the standard K'nex gray rods (shown in photo for reference, not included).
Buy from us with confidence! I am a lifelong avid K'NEX builder. I know the parts well and have a huge selection. Please feel free to contact us with any questions, or if we can be of any help finding a specific part for you. I would be happy to put together bulk lots of any part and quantity that we have available. Thanks for looking!