Selection of Compac heavy duty trolley jacks with 3 year warranty. Compac established 1946. Their vision was to build superior hydraulic jacks. Compac´s hydraulic components are manufactured in-house using high quality materials. Important raw materials like the special hydraulic tubes, seals, pressure balls, valve blocks, etc. are sourced from high quality raw materials suppliers only. There are no compromises concerning the quality of the critical raw materials used in Compac´s hydraulic systems.