The Q Second Avenue/Broadway Express/Brighton Local is a rapid transit service in the B Division of the New York City Subway. Its route emblem, or "bullet", is colored yellow since it uses the BMT Broadway Line in Manhattan. The Q operates at all times between 96th Street/Second Avenue in the Upper East Side of Manhattan and Stillwell Avenue in Coney Island, Brooklyn. Daytime service makes express stops in Manhattan and local stops in Brooklyn; late night service makes local stops along its entire route. The Q was originally the Brooklyn–Manhattan Transit Corporation (BMT)'s 1 service; beginning in 1920, it ran along the BMT Brighton Line in Brooklyn and the BMT Broadway Line in Manhattan. In the past, the Q has run many different service patterns in Brooklyn, Manhattan and Queens, both local and express, including QB service on the Manhattan Bridge and QT service via the Montague Street Tunnel. From 1988 to 2001, Q service ran along the IND Sixth Avenue Line in Manhattan, with a bullet colored orange. The Q also ran in Queens at various points, including to Astoria–Ditmars Boulevard on the BMT Astoria Line, Forest Hills–71st Avenue on the IND Queens Boulevard Line, and 21st Street–Queensbridge on the IND 63rd Street Line. In 2017, the Q was rerouted along the Second Avenue Subway.

The New York City Subway is a rapid transit system owned by the City of New York and leased to the New York City Transit Authority, a subsidiary agency of the state-run Metropolitan Transportation Authority (MTA). Opened in 1904, the New York City Subway is one of the world's oldest public transit systems, one of the world's most used metro systems, and the metro system with the most stations. It offers service 24 hours per day on every day of the year, though some routes may operate only part-time. The New York City Subway is the largest rapid transit system in the world by number of stations, with 472 stations in operation (424 if stations connected by transfers are counted as single stations). Stations are located throughout the boroughs of Manhattan, Brooklyn, Queens, and the Bronx. The Staten Island Railway is not officially considered part of the subway, as it lacks a rail link with the subway system, so passengers traveling between Staten Island and another borough must take the Staten Island Ferry or an MTA bus; free transfers are allowed to the subway and bus systems. The PATH in Manhattan and New Jersey and the AirTrain JFK in Queens both accept the subway's MetroCard but are not operated by the MTA and do not allow free transfers. However, the Roosevelt Island Tramway does allow free transfers to the MTA and bus systems, even though it is also not operated by the MTA.

Measures 4 1/4  inches long