Here are the key aspects of Contractors All Risks insurance:

1. Coverage: CAR insurance typically covers risks associated with the construction project, including damages to the worksite, materials, equipment, and liability for injury or damage to third-party property. It often includes protection against natural disasters, fire, theft, vandalism, accidental damage, and more.
2. Construction Phase Coverage: CAR insurance starts when construction begins and extends until the project is completed and handed over. It covers both the materials and the labor involved in the construction process.
3. Contractor's Liability: It may cover legal liabilities arising from third-party injury or property damage caused by the construction activities.
4. Material Damage: This aspect covers damage to the property being constructed, including the building, structures, and installed materials.
5. Plant and Equipment: CAR insurance can also cover construction machinery, equipment, and tools used on the site against accidental damage or theft.
6. Extensions/Add-ons: Depending on the specific policy and the needs of the project, additional coverage options or extensions might be available, such as delay in start-up (DSU) coverage, which compensates for financial losses resulting from project delays. 

Contractors All Risks insurance is crucial for construction projects as it protects against various unforeseen events that could lead to financial losses or project delays. Contractors, builders, developers, and project owners often opt for this coverage to mitigate risks during the construction phase.