Features... Piston-actuated for stabilizing vehicles in seconds! Automatically re-adjusts and locks during operations. Can be positioned completely under and parallel to rocker panels to avoid trip hazards and stabilize both side-to-side and front-to-back. Super compact! Leaves storage space for other vital equipment Taller than most step-chocks. Lightweight! Made from high-strength aluminum. Easily decontaminated. High max. load capacity per AUTO CRIB-IT! AC-14: 2000 lbs AC-17: 2800 lbs Visit www.FF1.com for more info.