Rolling Scissor Bridge Jack 4,500 lbs. Lifting CapacityFits 4-Post Lifts Runway EdgesHand-Operated PumpLow-Profile DesignPowder Coated Finish DimensionsOverall Length: 34.250 in.Overall Width: 22.050 in.Lifting Height: 3.750 to 11 in.Arm Extensions: 34.250 to 57.480 in.Base Adjustability: 33.900 to 49.600 in.Pad Height Above Runway: 3.750 in.Weight: 363 lbs.FeaturesThe low profile design eliminates the need to move away when the lift is at floor levelSmooth-rolling operationTotal of 3 safety lock positionsSpring-loaded rollers provide for positive jack rail contact and smooth sliding.