Dee Shackle rating is often too high for your caravan. Learn how to calculate the correct dee shackle size? Your Dee Shackle must be of a comparable size to your safety chain. The only way you can prove comparability is with a rated shackle or a stamped dee shackle.
Drawbar safety chain attachments should not come into contact with the road surface when the trailer is disconnected. – VSB1. Safety chains must be stamped at least every 4 links.