A deed following the form entitled “Executor’s Deed”, when duly executed, has the force and effect of conveying to the grantee the fee simple title which a deceased person had at the time of his death, or which the executor has with covenants that (1) the executor is duly qualified to act as executor, (2) the executor has full power and authority to bargain and sell the described premises pursuant to the terms of the last will and testament of the deceased person, or by virtue of an order of a court of probate, and (3) the executor and his successors shall warrant and defend the granted premises to the grantee against all claims and demands of any person claiming by, from or under the executor.