Thank you for looking. I bought this at a used fishing tackle shop thinking I would attach it to a landing net, but I have never used it. The total length (when extended) is about 2040mm, and the storage length is about 770mm. I believe the screw diameter is 6mm. Also, the screw depth is shallow, less than 10mm. Please check the photos carefully for details on the condition. Please feel free to comment if you have any questions. We kindly ask for your consideration only if you understand and accept these conditions.