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.
Dee Shackles and Safety Chains
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Safety Chains
Dee Shackle Tips to Select the Correct Size
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.