- Prevents up-ending semi-trailers when they are not connected to tractor during loading and unloading operations.
Also used to level trailers parked on sloped ground and to prevent landing gear from sinking into a soft surface. Features high-strength steel construction. Flush-type zerk fitting for lubricating. ACME screw. Meets OSHA regulations when used with wheel chocks. Includes reflective collar for visibility at night. Powder coat safety Yellow finish. FOB Shipping Point.