Hello, thank you for the question. The minimum height with extension added is 240mm. The jack has a large lifting range of 150mm to 440mm without extension piece used and 240mm to 530mm with extension added. The extension is very easily added or removed by removing the saddle, adding extension then placing the saddle onto the extension. It is only really needed on very high ground clearance vehicles such as 4x4's. The extension can be seen in the shaded part of the main product images. I hope that helps explain. Regards, Hilka Tools
Answered by: Hilka Product Expert
Date published: 2020-03-11