Differential braking

From FlightSim

Differential braking refers to using the brakes on the main landing gear wheels independently. Individual brake pedals for each main wheel (nose wheels and tail wheels don't have brakes) are installed on most aircraft (not all - some use a parking brake-type handle for brakes), and a few older aircraft have no brakes (typically they'd have tailskids, and wouldn't be very safe landing on pavement).

These brake pedals are, on most aircraft today, mounted as part of the rudder pedals, usually as toe brakes, but occasionally as heel brakes (not always on the rudder pedals).