Each Autobrake Selector Setting has a Maximum Pressure at Brakes (PSI) and a preset Deceleration Rate (ft/secē) except RTO, which is uncontrolled maximum pressure.
The following table applies to 737:
Autobrake 1 - Maximum 1250 PSI, Deceleration Rate 4 ft/sec2
Autobrake 2 - Maximum 1500 PSI, Deceleration Rate 5 ft/sec2
Autobrake 3 - Maximum 2000 PSI, Deceleration Rate 7.2 ft/sec2
Autobrake Max - Maximum 3000 PSI, Deceleration Rate 12 ft/sec2 (below 80kts)
Autobrake Max - Maximum 3000 PSI, Deceleration Rate 14 ft/sec2 (above 80kts)
RTO Full Pressure, Not Controlled