Depends what country you are in. Usually apiece of white cloth tided on the mid-point so that people can see it.
Towing a vehicle with a chain is illegal in CT USA.
Vehicle in tow
a pully
You need to use a tow strap not a chain.
white flag
In the state of Connecticut it is illegal to tow a vehicle in that manor.
We are not too smart doing this. Never tow a vehicle with a chain, as this is a accident waiting to happen.
they use a saw to cut large cunks of wood or metal
If one vehicle is towing another by chain or any other means on a public highway, it is advisable to warn other road users by placing a sign on the back of the vehicle which is being towed which reads ON TOW
To safely and effectively hook a chain to a vehicle for towing, follow these steps: Use a sturdy tow chain or strap rated for the weight of the vehicles involved. Attach the chain to the tow hooks or designated towing points on both vehicles. Make sure the chain is securely fastened and not twisted. Double-check all connections before towing to ensure they are secure. Drive slowly and carefully while towing to avoid accidents.
other than being sufficiently strong for the task, nothing that i know of. i would worry more about not running the towed vehicle into the towing vehicle and that the towed vehicle has brake lights though.
The key difference between flatbed towing and hook and chain towing lies in the method of securing and transporting the vehicle: **Flatbed Towing**: In flatbed towing, the entire vehicle is lifted off the ground and placed on a flatbed truck. It is considered safer and gentler on the vehicle because all four wheels are off the ground, reducing the risk of damage. It is suitable for all types of vehicles, especially luxury cars, sports cars, and vehicles with severe damage. **Hook and Chain Towing**: In hook and chain towing, a chain is wrapped around the vehicle's axle or frame, and the vehicle is towed with its rear or front wheels on the ground. This method is less commonly used today because it can cause damage to the vehicle's body or drivetrain. It is typically used for towing wrecked or non-operable vehicles to a short distance. Flatbed towing is the preferred modern method for minimizing the risk of damage, while hook and chain towing is an older method primarily reserved for specific situations.