of wheel-off and wheel-on), two for each wheel/corner of the car, one to remove the old tyre from the car and one to put the new tyre in place. Two stabilisers stabilise the car on each side at the middle of the car. The front wing men, if necessary, adjust the front wing angle (to provide more/less downforce) and/or change the entire front wing (in case of damage sustained during the race). The front and rear jack men use lever-type jacks to lift the car and permit the changing of tyres during the pit stop. The job of the front jack man is generally considered the most hazardous of the entire pit crew, as it requires standing directly in front of the car as it enters its pit box. Mechanics in this role have been injured in the past when drivers have overshot/failed to brake in time for their pit box. By contrast, due to the location of his duties directly behind the car, the rear jack man is the only team member not in his working position before the car enters its pit box. The fire extinguisher man stands ready with a hand-held fire extinguisher to put out any fires that may occur during a stop, at least long enough for the pit crew and driver to evacuate. This job became standard following Jos Verstappen's 1994 pit fire. Sometimes, more than one pit crew member may perform this role if a car comes in for an unscheduled stop with mechanical issues involving a fire/excessive heat (e.g. overheating brakes). Deprecated roles The lollipop man held the team's pit sign (nicknamed the "lollipop" for its circular shape, hence the name of the role), helping the driver identify his pit box on the pit lane and holding it in position during the stop to remind the driver to keep his brakes on while tyres are being changed, to remember to put the car in first gear once the jacks are lowered, and finally to signal the driver to leave the pit box once the pit stop was complete by raising the sign. Nowadays, this role is carried out by a traffic light system—drivers drive into their team pit by memory or by watching the crews out on pit lane and are signaled to leave the pit box by a series of lights suspended over the driver's head in the pit box controlled