Fender Caster Set

I bought these castors from Thomann a few months back. I had a broken one on my Marshall cab that needed replacing so the day I got them I put in one from the new set I got that day. It only lasted one gig. I replaced it and the second one I put in lasted two gigs. Fender have changed the design in the last year or so for these castors and they are very weak at the point where the tube meets the screw-in disc. I would not recommend this product to anyone. They fall apart within hours. I will be making a complaint to Thomann in due course.