CFSB Bancorp Inc provides banking services. It offers a variety of financial services to individuals and small businesses through its offices in Quincy, Holbrook, and Weymouth. Its primary deposit products are savings, checking, and term certificate accounts, and its primary lending product is residential mortgage loans. Its loan segment includes residential real estate, multi-family loans, commercial real estate, construction, Second mortgages and home equity lines of credit, Home Improvement, and consumer loans.