Wide applications: The jack blocks can be stacked and placed in multiple locations for easy leveling and stabilization. They provide a stable setup for heavy equipment such as truck cranes, crawler cranes, rough-terrain cranes, boom pumps, concrete pumps, fire engines, and small lifting platforms. Durable material: Made from high-density polyethylene, these pads resist wear, UV exposure, and harsh weather. They are waterproof and nonconductive, providing a smooth, level surface for the jack. Easy-to-carry design: Features easy-to-grip rope handles for portability and storage. Compact size allows quick placement under vehicle legs, delivering a solid and stable base. High load capacity: Supports heavy weights without bending or yielding, improving vehicle stability, enhancing safety, and protecting concrete or other surfaces from damage by heavy equipment. Practical use scenarios: Level a mobile crane on soft ground; stabilize a fire engine during maintenance; support a concrete pump on uneven pavement.