HEIN-WERNER HW93733 Truck Jack Stands is 20-Ton truck jack. It is designed to be used vertically with the ability to raise from 9-1/2 in. to 20 in. The hydraulic system is built with the specially coated ram to prevent rust and extend the jack life. Also， it features the technology of rapid 2 speed air hydraulic action to quickly advance the ram to the load. In addition， the built-in of the pressure relief valve gives you the ability to prevent from overloading. Also， the large rubber wheels enhance mobility for the unit. At the same time， the low body height allows you to lift from the axle or suspension. And the extension screw gives you the additional advantage to adjust the pickup height. - Specially Coated RAM Prevents Rust and Extends Jack Life - Large Rubber Wheels to Enhance Mobility - Pressure Release Valve Prevents Overloading - Low Height Allows Lifting from Axle or Suspension Specifications:- Capacity: 20-Ton - Minimum Height: 9-1/2 in.， Maximum Height: 20 in.， - Handle Length: 52-1/2 in. - Base Size: 20-1/2 in. x 13 in. - Extension Screw: 5-1/2 in. -Operating Pressure: 110 psi to 140 psi- GW: 97 lbs.

Pressure relief valve prevents overloading

Rapid 2-speed air hydraulic action quickly advances ram to load

Specially coated ram prevents rust and extends jack life

Low height allows lifting from axle or suspension

Extension screw permits pickup height adjustment

Large rubber wheels enhance mobility