Hi What is at the base of the mast support, is it a welded plate that you can fit u trailer bolts over to secure to the trailer? Thank you John

Hi John The mast support is just cut flush at the end as it's designed to go in a mast support bracket. We do sell a retro fit mast bracket that goes on a 40 or 50mm box section https://www.tridentuk.com/gb/trailer-mast-support-bracket-trtramsbrk.html Hope that helps Regards David