This hugely popular scheme has been specially designed with income tax benefits for both salaried professionals and businessmen.
Key Features:

No maximum limit for investment.
No Tax deduction at source.
Certificates can be kept as collateral security to get loan from banks.
Investment up to Rs 1 lakh per annum qualifies for income tax rebate under Section 80C of the Income Tax Act, 1961.
A single holder type certificate can be purchased by, an adult for himself or on behalf of a minor or by a minor.

Source: India Post