The contract to build the house.
The contract to produce lunch boxes.
The contract to screened t-shirts.
Duties of the contractor
(1) Complete the work. (either by himself or his workers)
And complete it within the period of time agreed.
(2) Find the necessary working tools.
(3) Allows the employer to inspect the work.
(4) May have the work done by the sub-contractor (either the whole work or the part) unless his skill/ personal qualification is the essence of the contract.
However, the contractor is still holding the liability for the fault and any act which may cause by the sub-contractor.