The KPH370.70 Two Post Lift is the only 18,000 lb lift on the market with double wall column construction. Each column is constructed with 20 strength increasing bends making it the strongest column on the market. Commercial vehicles series two post lifts are ALI (American Lift Institute) approved and are available in 18,000 lbs capacities. Like all RAV electro-hydraulic lifts the cylinders are manufactured by RAV in-house to maintained the best quality and longevity is assured. Only the finest Italian steel plate is used in the manufacturing of our structure and superior RAV design and engineering asure a safe and powerful lift system. Arms, adapters, and carriages are usually the first components to show excessive signs of wear on a low quality lift. RAV takes important steps to insure that our components stay working correctly and safely for years to come. The extending arms travel on roller bearings to ease operation when spotting for the under-body pick-up points. The 3rd extending member of each arm is constructed of solid steel (not a tube). This will maintain low pad height to safely swing under low rocker panels of cars as well.