Draper expert 15 30 tonne pneumatic trolley jack draper expert 43933 b i expert quality i b fast lift twin stage air operated jack manufactured from high quality laser cut steel safety overload protection with dead man s controls and four position locking handle chrome molybdenum vanadium pistons with special liquid nitride anti seize surface twin rubber tyred wheels for ease of movement around workshop supplied with 100mm extension to increase jacking range air operated with mal