Heavy-duty construction with captured scissor rollers for maximum stability. Superior hydraulic systems feature an integrated pump-cylinder for maximum reliability. High quality casters and wheels for exceptional roll ability (two fixed, two swivel). Ergonomic push handle with convenient lowering control. Lowering control automatically stops when released for added safety. Convenient maintenance pins secure the scissor legs for inspection and maintenance on larger models. Quality powder coated finish provides exceptional durability and corrosion resistance. Platform Height Lowered Wheels Included: 15". Platform Height Raised Wheels Included: 39". Platform height dimensions include the wheels: 40"W x 38 5/8"L.