Locking devices
Wheel stop,
partially adjustable, blocked only the wheel and not the swivel head.
Total stop,
partially adjustable, blocked both, the wheel and the swivel head.
Directional lock
for partially fixing the swivel castor in driving direction. (The swivel castor changed temporarily in a fixed castor)
Stop in backlash
Backlash means that the stop is behind the wheel in driving direction, following the wheel.
Stop in forerun
forerun means that the stop is before the wheel in driving direction.