Vestil FL-ADJ-46 Adjustable Height Floor Lock, Heavy Duty Cast Steel, 6-1/4" - 8" Extended Height, 5-1/2" to 7-1/4" Retracted Height Uniform locking and safer unlocking force offers better ergonomic operation Heavy-duty cast steel construction offers long lasting use Pedal release has a visible & convenient location Bottom pad includes suction-cups for extra grip